Part of what I was experiencing was a post-operative depression, but I was also going through the early stages of an identity crisis. I mentioned my feelings to Mr Baldwin, but he told me not even to think about it and "just get on with my life".
A month later, I left the hospital and moved into a medical halfway house a few miles away.
Now that I could eat like a normal person, I found, bizarrely, I'd developed a sudden fondness for certain foods I hadn't liked before: Snickers bars, green peppers, Kentucky Fried Chicken takeaway. As time went on, a strange question crept into my mind. Although I hadn't thought much about my donor, I was acutely aware that I was living with a man's heart - and I wondered whether it was conceivable that this male heart might affect me sexually.
Until the transplant, I had spent most of my adult life either in a relationship with a man or hoping to be in one.
But after the operation, while I still felt attracted to men, I didn't feel that same need to have a boyfriend.
I was freer and more independent than before - as if I had taken on a more masculine outlook.
My personality was changing, too, and becoming more masculine.
I was more aggressive and assertive than I used to be, and more confident as well.
I felt tougher, fitter and I stopped getting colds. Even my walk became more manly. "Why are you walking like that?" my teenage daughter Amara asked.
"You're lumbering - like a musclebound football player." This new masculine energy wasn't limited to my walk. I felt a new power that I associated with strength and vibrancy.
A certain feminine tentativeness had fallen away. My sexual preferences didn't change in an overt way -I remained a confirmed heterosexual - but something had shifted deep within me.
And I could tell that others sensed it, too. I became friendly with a blonde woman I met at a conference.
We spent time together and, when the conference was finished, I invited her to stay for a few days.
It was innocent on my part, or so I thought, but as soon as we were alone she made it clear that she was interested in a sexual relationship.
I declined her invitation, but her surprise at my lack of interest made me wonder what kind of signals I had been sending out without realising it. Around this time, I also had the most unforgettable dream of my life.
In it, I was in a grassy outdoor place, it was summer, and I was with a tall, thin young man with sandy-coloured hair.
His name was Tim - possibly Tim Leighton, but I'm not sure.
I thought of him as Tim L. We seemed to be good friends.
As I walked away from him, I felt that something remained unfinished between us. I returned to say goodbye and we kissed.
I seemed to inhale him into me in the deepest breath I had ever taken.
I felt like Tim and I would be together for ever. When the dream was over, something had changed.
I woke up knowing that Tim L was my donor and that some parts of his spirit and personality were now within me.
I wanted to check this information, but the transplant programme observed a code of strict confidentiality.
I called Gail Eddy, the transplant co-ordinator.
Although she couldn't tell me who my donor was, I hoped she could confirm the name Tim L.
When I asked Gail, there was a momentary pause.
"I'm not supposed to discuss this with you," she finally replied.
"Let it go. You're opening a can of worms." I was disappointed, but I respected Gail's judgment and assured her that I'd drop the subject.
The subject, however, refused to drop me. Some months later, while out at the theatre, I met Fred, a rather handsome guy from Florida.
We talked about my transplant and about the donor. I wasn't sure if Fred was genuinely interested in my operation or if he was chatting me up, but there was something about him I liked and I gave him my phone number.
Fred called the next morning and was eager to meet.
He said he'd been moved by my story and - bizarrely - had had a dream in which he saw my donor's obituary.
Together, he and I decided to go to Boston (the nearest city to the accident) and search the newspapers for my donor's obituary.
Fred was already there when I arrived, scrolling through the newspaper for the week of my transplant.
We soon found the item we were searching for - an obituary for an 18-year-old who had died in a motorcycle accident.
His name was Timothy Lamirande. My dream about "Tim" was true after all.
I felt a weakness in my knees and collapsed into a chair.
The clipping mentioned five sisters and two brothers.
The family of my heart were right here on a piece of paper. Until this moment, in a strange way I hadn't been 100 per cent certain that the transplant had even happened.
The process had been so otherworldly that it was easier to view it as a miracle.
But, suddenly, I knew the donor was real and that he had a family.
There was the proof: a name, an address, a town.
A few days later, I met Gail Eddy and told her what had happened.
I asked her if she thought it was possible that Tim's name was spoken by one of the doctors during my surgery and that it somehow permeated my unconscious.
"I was wondering the same thing," said Gail.
"But the doctors are never aware of the donor's name.
Besides, Mr Baldwin works in near silence: not a word is spoken."
Almost nine months later, I had another dream about "Tim".
I felt he was doing everything but send me directions to his parents' house, so I decided to contact his family.
I wrote to them and they agreed to me visiting them.
I drove to Milford in the state of Maine with a close friend.
We waited in a car park where Tim's father would meet us.
As a large brown car drove slowly into view, my stomach tightened.
Mr Lamirande was smaller than I expected and greeted us with a simple "Hello" - not the profound moment I was expecting.
We followed him to the house.
Tim's parents lived in a world of freshly-mown lawns and large clapboard houses.
I was incredibly nervous, and surprised to see three of Tim's sisters there to greet me, too.
So there I was, with Tim's heart inside me, sitting on Tim's couch next to Tim's mother, and we were talking about the weather.
We exchanged small talk before being joined by Annie, a fourth sister, who was closest in age to Tim.
Leaning against the mantelpiece, she looked me in the eye and said: "So tell us how you found us."
The only thing which interrupted my story were the exclamations of amazement. When I'd finished, many eyes were misted over with tears. "None of the other people who received his organs have been in touch with us," Tim's sister Carla said.
I learned that in addition to his heart and lungs, the family had donated Tim's corneas, kidneys and liver.
Mrs Lamirande - June, as she had asked me to call her - went to another room and returned with a framed photograph.
Sitting back on the couch, she turned the picture so I could see it.
Tim wore glasses, although I hadn't seen him that way in my dreams.
In this photo, he looked about 14.
He was dressed in formal clothes, standing beside a priest.
But even with the glasses, I could see the sparkle in his eyes. June started to say something about Tim when she suddenly choked up.
Now the tears flowed. I felt a bond between us like nothing I had ever known. But I couldn't quite comprehend this: me holding Tim's picture in my hands and his heart in my chest.
I paused to take a breath and Tim's lungs filled with air.
Except that they were my lungs now.
Mine to breathe with, as I grieved with his mother next to me. June said Tim had had a tremendous amount of energy.
His sisters described how difficult it was to baby-sit him and how he tried to run away from them.
"He was restless," one of them added. Perhaps it explained why I, too, now had so much energy.
"Was he a beer drinker?" I asked. His sisters nodded.
When I told them how I had wanted a beer soon after the operation, there were smiles all around. It was so amazing just to be there that I had to remind myself that I had come with some specific questions.
I asked if Tim had ever had colds and whether he recovered quickly.
They told me that he was hardly ever ill, and I wondered if this explained my new-found resilience?
I also asked if he liked green peppers.
I'd never liked them before the operation - but afterwards I loved them and included them in virtually every meal.
His sister told me that, yes, Tim had loved green peppers - "but what he really loved were chicken nuggets".
This explained my trips to Kentucky Fried Chicken. I was dumbfounded.
Later that weekend, before going home, I went for dinner with the Lamirandes at a local restaurant.
In Tim's honour, I ordered chicken nuggets.
The conversation was light; far removed from the purpose of my visit.
"I'm not much of a correspondent," June told me, "so I won't be writing very much.
"But we want you to know that you're welcome here any time you like."
As we walked back to the Lamirandes' house, June asked if I wanted to come in for a little dessert.
Once inside, June disappeared and returned with a huge cake, decorated with a single word in large print: WELCOME. As the mother of my heart presented the cake to me, her face was beaming. "Chocolate," she said. "Tim's favourite." • Extracted from A Change Of Heart - A Memoir, by Claire Sylvia with William Novak.
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I was given a young man's heart - and started craving beer and Kentucky Fried