Why am I eating so much.. How can I stop!? I never used to be like this..?

Last year around this time, I was introduced to the world of anorexia. I restricted my calorie intake to no more than 500 and went days & days without eating. I started out 143 lbs and in a matter of 2 or 3 weeks I went down to 128 lbs. I'm 5'3. I don't remember what stopped my anorexic ways.. I think it was because of my mom, and how I hated making her upset & lying to her. But the thing is, for the past year, I've been trying to get it back... I always fail and end up binging. A binge to me is like, an endless amount of food no exaggeration. I eat like I'll never see food again. I'm back up to 145 lbs btw, and as of two weeks ago I decided to go back to weight watchers which is what I was doing before my eating disorder. But now, even weight watchers, the most simple 'diet' plan in the world is difficult to me. I keep binging!!! I don't want to be this way but I'm completely losing control over myself.