I awoke the other morning at 4:30 am, went to the restroom and when I got back into bed my heart was poinding very hard. I went in and my bp is normal, EKG was normal and all blood work was normal. I was fatigued for a few days. Yesterday I was feeling pretty good so I decided to climb some stairs during work. I did 5 flights and afterwards my heart felt like it was pounding for a few hours. I'm a CPA, but don't feel overly stressed. I eat healthy and workout regularly. Should I be worried?