Hi
first of all,my name is peggy,and I had that problem,when I was about 23. You could have tachycardia,which is just means you have a fast heartrate.,and as long as you dont get out of breath and pass out with this,you are ok.,but,if you are that worried about it,i would say,see a doctor. Are you an anxious,and excitable person? This leads to it,too. Also,alot of caffeine. I speak this from experience,believe me,but it never hurts to see a doctor for a checkup. :d