I was 24 and doing unpaid work in an art gallery in west London, when someone noticed a bald patch the size of a 10p piece on the back of my head. I thought it was strange, but I couldn't see it myself, so I didn't worry too much. At the time, I was very stressed. I'd recently moved to London with my boyfriend, Mike, and we were living with his mother. We'd met at university - he was a mature student and a good painter.