Hello, Im a 21 year old male, and when I exercise, I will take my pulse cause I suffer from anxiety. However, I was wondering if its normal after you exercise to suffer from like irregular beats or premature atrial contractions. It feels like my heart beats sooner than it should....is this normal or should it something to be looked at? I've had echo, chest x-ray, physical exams, ekg, and holter. Nothing important reported...please respond...thank you!