I have had chest pain for about a year now. I had a chest xray, ekg, ultrasound on chest, running tread mill test. for my heart and everything come up normal. I do have acid reflex which started about the same time. I had the camera down my throat and discovered acid reflex my nothing else serious, no cancer or barretts. I am on nexium and my reflex is better but not gone. No one knows what is causing this pain. I seems better when I am laying in bed on back or side slightly elevated. I seems to be on left and sometimes right side, but not burning, like a dull ache. Doctors don't know.