You must have me confused with someone else, I have never had anorexia.
I definitely think that hormones can play a big part though. I was on the pill for a few years and I went off it about 8 months ago because I heard that it can play havoc with your system/energy levels/weight training, etc. I don't know if I notice much of a difference being off the pill but nevertheless I'm not going to start taking it again. It could take a while to re-adjust.