How can i get back to my original weight?

i am new to this website so...yeh.

okay, so last Friday (01/06/2012) i was 42.9kgs. now its the next Thursday (07/06/2012) and i am 45.4kgs. i'm really depressed. over the last week i have been binging non-stop. i tried restricting, but i ended up binging. i was anorexic for about 7 months before i decided to recover. i didn't mean to recover this quick and i'm so depressed. i feel really sick and i didn't purge any of the food that i ate. i tried to but i knew i could become bulimic and i don't want that to start. i'm so depressed. please help. i want to get back to 42.9kgs. 

i'm 14, female

height: 158cm (5ft2)

current weight: 45.4kgs (around 100 pounds)

If you're having food issues of this magnitude, go to your parents and get real help, not lay-person help from the Internet.  This is serious.  Don't start doing this to yourself (again).

i have talked to my parents and they only give me lectures. first they wanted me to gain it, now they're mad at me for gaining. i binged again today and i'm now 46kgs.

You need professional help.