My heart has been racing for a couple weeks now. Heart rates ranging on average from 111 to 122. I do nothing to cause this. It is like this even while sitting down doing nothing. Along with this and for even longer my left arm has felt like it has a rubber band around it cutting off circulation or something. It sometimes gets so painful i can not hold it up to wash my hair or even put it in a pony tail. Well now the last few days I ve been having an issue with my neck. It feels as if the main arteries (or at least the largest ones) on both sides are a out to explode. It mainly feels like this if i move in certain positions, do any kind of work and most definitely cough. Coughings the worst. It also feels as iff the sensation may be starting to go down into my right shoulder a bit. What is going on and how worried should i be? I ve told two of my doctors about my heart rate and my arm and they just brush it off.