My heart has been racing on and off for a couple years now. I have been to the doctor and had a EKG, and I also had a stress test. Both came out fine. But my pulse usually runs about 119, and thats with me resting! Not to mention that sometimes I feel like I’m on a roller coaster. Any ideas of what it might be? I havent been to the doc about it since that first visit a couple years ago. Thanks!