Is it possible to hear your hearbeat outside of your body?  My husband also heard it.  We about to go to sleep when we started hearing a thump noise.  It was coming from my chest.  I was not in pain, nor dizzy. I did not feel any symptoms besides the feeling of every thump.  I took my blood preassure and it was normal.  My heart rate was 84.  Everytime I changed positions or moved the noise would stop but as soon as I relaxed we would hear it again.  I have a prolapse mistral valve (diagnosed as a child and now I am 45).  Could it be related to that?
Thanks for your query. The symptoms which you described could be related to your mitral prolapse. Did you also feel irregular heart beat ? I would suggest that you do ECG and Echocardiography to see the structure of your heart and condition of mitral prolapse. Please do get appointment from the cardiologist so that you can be examined and investigated thoroughly.