Is this an eating disorder?

Okay, so I think I need help:/ Ever since a few months I've been eating large amounts of food. My stomach then gets all big, filling with the food, making me have depressed, you stupid fat whore thoughts inside my head. I will not eat again until my stomach goes back down to its "normal" size. No matter how hungry I am, I WILL NOT eat if my stomach is even slightly larger than its smallest size. I will eat when my stomach is small again, and the process repeats. I can't really stop, and I can't stop looking in the mirror and thinking "ew," right after I eat either. Is this an eating disorder, or am I just being paranoid? If so, what's it called? Thanks.