Okay, this has been going on for about a week now and I have no idea why. It's never the same food, but it's usually more common at night. After I eat, approximately 30 minutes after, I will become severely nauseous. It will sometimes wake me up it's so bad. I'll go in to the bathroom thinking I might have to throw up, but then I'll just belch, and that seems to make the nausea a little less. I hardly ever actually throw up. Then, after I've belched a few times, it seems to go away.

I've never had this problem before, I'm 20 years old, and NOT pregnant.

Any ideas?