I ve been having irregular heart beats many times a day for about 4 days now... and tonight, a little left-side pain (arm, shoulder, chest) .... my BP seems okay, I think(?) .... 4 hrs ago it was 120/61 and heart rate was 72bpm ..... a few minutes ago, my BP was 112/69 and heart rate was 59bpm .... just wondering if I should be concerned.