For about a month now occasionally when I have gas, my burps have a rotten taste to them. It's only sometimes about 3 times a week and it happens at random times throughout the day. I also feel pains in my stomach and sometimes even throw up or have diarrhea. Nausea and diarrhea will last all day if they occur.

At first, I thought it had to do with starting birth control but it has been going on for a lot longer than the symptoms of starting the pill for the first should be going on.