Maybe the problem isnt that your throwing up, but that your over eatting. I have done it before, I pig out too much, and then either feel guilty, or just gross because im so stuffed and want to get some of it out, need to release, but yeah you need to not over eat, that is a problem, if its causing you to get sick, a few times a week, I think thats a sign there is a problem, so try to portion yourself when eatting, tell yourself enough is enough, and if you do eat to much say well deal with it! Don't train your body to think it can just throw up when its full. Best of luck to you! : )