I had a read up on it after replying earlier. I have to say well done on losing the weight though, must feel like a great achievement.
Did you follow the proper course, with the counselling and eating all the daily packs, which I note are meant to contain your RDA, and be monitored by your GP throughout?
I found a post by a lady who said she found hair loss, as did some others, after coming off the diet, like a delayed reaction.
Pop and see your GP just to make sure nothing else is causing it and they may be able to help you are not getting all you need in your diet now you are eating normally again in case you need some vitamins or minerals and such.