It's not a stupid question, I totally understand how you feel. I had weight issues my entire life. With help from my parents,i was convinced over the years that I need to lose weight. But according to the bmi chart I am at healthy weight. Your eating habits sound a lot like mine. I've been trying out diets, starving, vomiting and other purging ways. At some points I lost weight, at some points I gained a pound. My mom said I look like I put on a little weight yesterday, which I didnt (i know because I weigh myself every 15 minutes of the day) so I purged thru omitting my insulin (im diabetic) and felt sick in the morning and threw up, and lost about 5 pounds in one night. Dont get the wrong idea, I felt so gross and my throat stung so much. But to answer ur question, I think it's called ednos - eating disorder not other specified. U can find out more about it on the web or google.Com or something. Hope that helps.