Normally, I'll start getting hungry about two hours after the last time I ate, and I'll usually eat what I guess would be a normal amount of food for anyone. People remark that I eat a lot but I really don't. For the past two or three ish weeks, I'll start getting nauseous about halfway through whatever meal I'm eating. But my actual appetite hasn't really gone down, I'll get really hungry again a short time later since I had to stop eating due to the nausea. I'm currently not experiencing any other symptoms. A friend had suggested a couple things including pregnancy and a possible parasite, but since I have no other symptoms, it could really be anything.