How do i know if i have an eating disorder

Im twenty years old I got pregnate at the age of sixteen with twins before I got pregante I use to weight about 98 pounds after I had the twins about 120 pounds then a year later I got pregnate again after I had my third child I weighted 150 pounds I got in a strick diet and have lost alot of weigh right now I weigh 105 with is find but I only eat healthy food salads water cranola bars ext... but if I eat like pizza cake or munchies I tend to get sick and throw up why does that happend to me I don't do it myself my stomached just feels sick.

Read this article about diagnosing eating disorders.