Don't worry my dear... I am glad to hear yours does too. :) :) It simply means your heart is frivulating. It doesn't mean there is anything wrong with you or your heart. You might be excited about this or that. Just remember to slow down and breathe. Smile. Relax. You are going to be just fine. Tomorrow is a great day. It will come soon. Close your eyes and Believe. Everything is going to be grand. I believe. :) :)
That happens to me sometimes. Very frustrating. In my case it generally means that I'm having trouble turning my mind off and am not ready to fall asleep. Reading before bed and getting genuinely tired seems to help.
See your doctor. It is not a normal occurrence but doesn't automatically mean you have heart trouble. The older you are the more you should pay attention to heart rhythms. Mine is too slow.
I have no idea. Maybe it feels like you are out of control and it scares you. The racing heart scares more but also detracts from what is the real issue.
A racing heart is what someone feels when they are in the fight or flight mode. It is related to anxiety for sure.
The hardest solution is the most effective. Deep breathing, yoga postures and a meditation tape.