Why do i keep waking up?

I have experienced the symptons that you describe, and it sounds like it could be caused by anxiety, are you worried about something,? When it happened to me I sought advice from my GP, who, to be on the safe side sent me for an ECG. Do not think that you are wasting the doctors time, go now and get it checked out,just to be on the safe side, and put your mind at rest. Don't worry it will only make it worse. Good luck, and I hope everything is ok.