When I cough heartbeat goes very fast for half and hour then all disapears should I be worried?

I wouldn't be too worried, but would see doc to eval you for svt ( supraventricular tachycardia) with holter monitor.

Wear it and try to make symptoms happen. I am not worried because svt usually occurs at a relatively fixed rate. If it happens again, it will happen at the same rate and not faster. Since you tolerated last episode well, you will tolerate the next. Would you like to video or text chat with me?