I think that I have IBS as I have every symptom and have none of the symptoms that rule out IBS, though I haven't yet been to a doctor for it. Recently I started having these episodes that begin suddenly with rancid, rotten-egg tasting burps that just keep coming! Eventually I will get really bad waves of pain in my upper stomach, and sometimes feel nauseated. After vomiting up EVERYTHING in my stomch, I start to feel better, though I usually have diarrhea for at least a few hours after. At first I thought this was a lingering stomach virus, but I've had it 6 times in 5 months now. Is it possible that this is a part of IBS? Or could it be something more serious? At least is there a way to get rid of those horrible burps? Any thoughts would be greatly appreciated, thank you!