I've never taken anti-depressants, so I can't really imagine what sort of emotional storm your experiencing. Like
>>2 I think the best way to help is to at leat try to talk to your therapist/someone you trust who can help you (give support). I'm guessing you've been suppressing your emotions/thoughts/memories(for reasons only you know), which than builds up and begins expressing itself, for you through self-harm/ED. The thing is eating disorders and self harm is not the true problem, but what is making you do them is :( This sort of behavior can easily turn into a habit (and it's so hard to break free from).
I do however believe that if you believe you can stop this behavior you can! So don't give up!
Because life isn't easy, that's why I live on.
Good luck and I wish all the best to you!