I am a 38 year old male who smokes ones pack a day, 5'8" 225lbs. One month ago I had raoid pulse and dizzy feeling while driving to work, After about one hour My heart rate returned to normal and I felt very tired.Well 2 days ago I end up in the er with Rapid heart 110 bpm and light headed I have a constant bloating and gas problem in upper stomach and heart burn, The er doctor does ekg, chest xray and blood test and said all were fine. Uppon hearing this my heart rate returned to 75 bpm. The problem is I still have pain under my rib cage and lots of belching. My heart burn is terrible and I cant get over the feeling of dying. I never have any pain or discomfort when I execise, only when I am at rest. Any sugestions?