Less coke, caffeine, salt more sleep, cardio exercise, water balanced meals might help. Are you eating more than 1 or 2 meals a day? Getting enough water? You may have tachycardia or some sort of cardiac arrhythmia. Some arrhythmias are not serious while others are very much so. Best to get this checked out again by a physician. nlm.nih.gov/medlineplus/tutori... Do you have high blood pressure? Is your resting heart rate normally high? Tachycardia is a resting heart rate more than ~100 beats per minute (this # depends on the person s size). Some possible causes (other than heart defects) -- dehydration, stress, abnormal blood sugar levels, hyper-sensitivity to caffeine or alcohol. Smoking tobacco various drugs can also account for this. You blood sugar levels may be out of whack if you are diabetic or if you only eat 1 or 2 meals a day. Things to do: ~ see a doctor ~ drink plenty of water ~ eat 3-5 balanced meals per day ~ moderate cardio exercise (don t overdo) ~ avoid snacks that have a high glycemic LOAD ~ cut back on salt, caffeine, alcohol, nicotine other drugs