My Eating disorder is changing? HELP?

I'm 15. 120 pounds and 5'7. I had anorexia, which turned into Bulimia, which now is kind of changing into binge eating disorder. I'm in recovery, and am not paper thin ( I have fat on me some ) and have gained weight slowly ( about 3-5 pounds ) I'm trying to gain back muscle I lost because I'm am I naturally good athlete. However today was horrible because I relapsed. I binged and purged my food. I ate very unhealthy like 2 loaded peanut butter and jelly sandwhiches, bananas, oranges, chips, sardines, yogurts, cereal, and a little bit more. I'm afraid that because I ate that that's going to turn into fat. the kind of weight I don't want. I have been binging for about 4 days... I don't know why I can't stop. Why did I suddenly love to eat when I used to avoid eating and starve myself?