Hey guys I was wondering if this is a pinched nerve or a heart problem. basically I am feeling a tingling sensation down my left arm sometime with upperleft chest discomfort. Also I get a very painful heavy tight feeling in the middle of my chest for a few seconds like somethings sitting on top of my chest which causes me to lose me breath, then it goes away. Also when I have coffee/energy drinks/ dexamphetamine/ritalin for ADD which causes it to get much much worse almost scary. This has been happening for about 9 months. its gradually getting worse? Pinched nerve or heart problem?