Hi There. I’m Freaking Out Because For The Past Two

Hi there. I’m freaking out because for the past two days I’ve been feeling my heartbeat very strongly in the lower left part of my neck right above my collar bone. It comes and goes and the best description I can give is it feels like it would be an artery about explode. There is no pain. I can feel it without touching it and although I can’t see any movement when looking at it in a mirror. I have high blood pressure and I just want to know if I should go to the hospital soon or immediately.