Heavy heartbeat

I had my second catheter ablation two weeks ago for WPW, and was also on beta blockers for couple months until the surgery. Doctor said the surgery was a success and the delta wave was gone.  Now I can feel my heart beat all the time and hear it when i lay down, its also very "heavy" beat. Also sometimes I can feel slight pain around left side of the chest. My blood pressure is sort of low usually around 110/65 mmHg, and resting pulse is 80,90bpm. Its driving me nuts and i think something might be wrong with. Now I don't know if this is normal or should I be concerned?
Thanks,
Michael