Judy- Not sure what kind of pain you are having, but I asked my doctor a similar question and he said as a general rule of thumb, if it doesn't get worse under stress/exertion, it's most likely not cardiac. I had soreness in my sternum (I can only describe as chest-bone pain), and it was my GP, not the gastro, that recommended getting my vitamin D checked out. Levels were far below normal, and about a month after taking supplements daily, chest pain vanished. Hope your 'stomach problems' improve.
Crohn's proctitis since 1992. Currently on 25 mg/methotrexate inj./week, prednisone, avelox, lomotil, folic acid, vitamin D3 and 0.5mg ativan