After three and a half months of dieting, I am pleased to announce that I am losing weight steadily at 1lb/week, have kept to my plan without any problems (apart from suddenly having to reduce my fat intake when I turned out to have active gallstones), and at 122lb am now halfway to goal. I'm just into the healthy BMI range, although I recently started measuring and discovered that my waist-hip ratio is dreadful. Still, I do at least appear to be losing inches, and it gives me something to answer with if people ask me why I want to continue losing weight when I'm at a healthy BMI, plus it's less personal than explaining about how I still get PMDD at this weight but didn't when I was thinner.
My clothes are looser - I really hope that belts continue to work for me until I reach goal, I can't afford interim new clothes! - I feel happier, I'm no longer afraid to look in the mirror, and it's really wonderful to feel that despite having a severe medical condition which affects every aspect of my life, I can finally control something about my body again.
Meanwhile, back to staving off PMDD for today. Gah.