question: Ive been havinf cheat pains bad the last few days. Ive had a complwte heart check up ekv,blood work,xhest xray,echo,stress test halter moniter. All xame back normal. I do suffer frm acid refulux but this pain is all day n night. No acid meds r heling and the pain radiates down my left shouldet and arm. The pain alsomoves fron top of left chest to center sternum and under left breast could this be cardiac?