about 48 hours ago, I began to experience a feeling in my stomach like when you have indigestion, and I would burp and it was very foul. When I would eat something, my stomach would have pain and I would get full really fast. The foul burp has continued for the last two days and that discomfort in my stomach has not gotten better. I tried antacids and I also tried alkaseltzer thinking maybe I had indigestion.