I've been having like 100 heart palpitations a day and every test the doctors have done is normal (EKG, blood tests, thyroid, etc.). 

The cardiologist mentioned that stress and anxiety can potentially be a cause. I notice I get them when I lay on my side, after I eat, and sometimes at night when I have nothing to distract me. 

Has anyone else experienced this symptom due to anxiety and if so, what did you do about it? They are very annoying and every time I have them I just get more anxious about it.