Hi, I have been having heart palpitations for over a week now.? I went to my dr and had an EKG which was normal, but they kept coming so I went to the ER the next day and had another EKG and a meart monitor for 2 hours. Still they say heart looks good. THey also drew blood and said my Thyroid is good, potassium levels are good along with magnesium. THey also said I am not pregnant. Any suggestions what may be the cause???? I am 27 years old, I don t smoke, don t drink alot of caffine, no supplements. I don t work out as much as I used too! I am on no meds except my Dr. gave me anxiety meds when I feel anxious becasue of them. I do have anxiety attacks alot, sometime for no reason. I just have never felt the palpitations before. Thank you for all your wonderful answers! I am new to this but I found it very helpful!!