Recurrent sharp pains deep in my chest feels in center sternum, left breast, or left armpit. ekg fine a month ago. abd us neg. what else could it be?

Chest pain: Might still be cardiac in origin; may need cardiac stress test/angiography to be sure. Gi problems like reflux disease can also cause pain in that area, especially if exacerbated by acidic/spicy/fried/fatty foods/alcohol/soda pop. Other possibilities:aortic aneurysm; costochondritis. See pcp/internist for thorough workup & treatment regimen.