Couple of thoughts...
1) Quit now and join up!!! There is no reason to delay...it won't get any better just cause it is your birthday, Christmas, a Friday or whatever....quit now.
2) It will suck...but embrace the suck. The pain is your body healing from years of putting poison in your lip.
3) Substitute working out, seeds, mints, really anything for dipping. I guess you've seen the posts about gaining weight...it didn't happen for me, but I know it can. Anyway, I'd rather struggle with losing a few pounds than have my face destroyed by surgery to remove my jaw.
4) Get professional help on the eating disorders. I don't really know anything about eating disorders, but I know that they are serious.