All my life I have gone through tests and different doctors trying to figure it what was wrong. We never did figure it out, but when I feel like that I eat saltine crackers, toast, sprite or 7up. If it is anything having to do with acid and your stomach lining, bread and bread products will help I guess absorb it so it doesn't iritate. I know your pain. I had an abulance called one time because I had heart burn so bad the doctors thought I was having a heart attack, I think the worst pain I have ever felt! I hope you feel better!!!