I purge to vomit but i end up shaking?

5 signs to watch for: You may have an eating disorder if you answer yes to two or more of the following: 1) do you force yourself to vomit because you're uncomfortably full? 2) do you worry that you've lost control over how much you eat? 3) have you lost >14 lbs in a 3 month period? 4) do you believe you're fat when others think you are too thin? 5) does thinking about food dominate your life? (from aarp magazine).