Hey, troubledteen19, and welcome to Psych Central! Did your doc put you on such a calorie-restricted diet? No wonder you want to binge. I would, too.
You have NOT ruined everything. Just start back with your eating plan--and maybe get some exercise. Even some walking.
Check out this forum, please, looking at the stickies at the top:
http://forums.psychcentral.com/self-injury/.
Okay? You will be all right.