Sleepie,
So sorry you are stressed and feeling bad. I do not have any advice on the mean kids except that maybe if you do not react to them hopefully they will get bored and find another target. Very scary, my heart goes out to you. I was terrorized as a kid all through school. It is not fun and I can relate.
Don't worry about the weight it will come off. I have a very close friend in AA and she gained a lot of weight due to drinking. Right now she is concentrating on staying sober because she knows that she can alway work on the weight later. Sobriety is #1 right now, and without it she will neither have the will or the way to loose the weight when she is ready to deal with it.
Just don't pick up that first drink. Stay in today, the past is over and the future is yet to come so you can't do anything about either one. Be easy and good to yourself.
Hope you feel better soon. Lots of huggs and kisses.