48 yr old male non smoker 79 bpm. after light activity I have shortness of breathe, slight heart burn, fluttering in chest, no dizziness only lasts for a few seconds, if i put my hands on my head after a few seconds it feels like my heart has hard beats, no swelling of any kind any were. I do have a prescription for omeprazole but i dont have a need to take it on a regular basis. Not sure what is goin on?