If in doubt check it out. We all can pretty much hear or feel our heart beat especially if we are stressed or anxious about something. If you feel there is a problem, please go see the dr because I am no dr and I could not tell you if there is a problem or not.
Good luck and keep us posted with what you find out.

Best to go when it is happening so they can do an ekg and they can find out why you are having rapid heart beats..

Good luck. I went and I am sure glad I did because they found I had wolf parkinson white. Your heart is nothing to mess around with. It could be nothing to worry about, but best to have the doctors check you out.

The fast heart rate, as others were saying, is from rapid blood loss and the heart trying to circulate adequate amounts of oxygenated blood to the vital organs. Try to stop the bleeding first since too much blood loss will cause the person to go into hypovolemic shock.