Hi, I'm 17 years old and was diagnosed with autonomic dysfunction when I was 14. When I was first diagnosed with autonomic dysfunction I had periods of random tachycardia, but I haven't had any major symptoms for almost 3 years. Recently though, I've had a feeling of my heart stopping or pausing while laying in bed at night. Everytime this happens I basically feel like I'm dying, but the pauses are either followed by a fast heart beat or it'll slowly start beating again. I've went to see a cardiologist and he said it was mostly likely ectopic beats and nothing to worry about, but I'm still feeling uneasy and was wondering if anybody can relate or has any information on this. I've also had EKG that turned out fine.