For the last 2 nights after supper, I have had pain in the left side, under my breast, going to my back, and heartburn; If it had been on my right side, I would have thought it was the gallbladder. After I took Pepto-Bismol AND Tums, it eventually went away. Last night it happened again, after supper, but this time the pain also went into my left arm down to my elbow. I took the Pepto as before, then started thinking maybe heart? And I knew if I took aspirin it would help the arm pain anyway, so I took two. After awhile I took Tums to stop the heartburn. I felt better after awhile. What could it be? Could it actually be heart-related, or is it just that I'm eating greasy food? Also, I do have a PEG tube I've had since surgery in May. I don't use it anymore, just Flush it out every day.