recently, I have been getting some weird pains around my heart. Its not tightening or pressure just some shooting pains that go seem to go along with my heartbeat. Soon after my left arm from the elbow down goes numb and I feel dizzy. also, i have had a couple episodes at work where my feel pins and needles and get very disoriented and dizzy. I thought maybe it was all in my head, because my blood pressure and heartbeat are fine. I only worry because my lung collapsed (spontaneous) before and before it happened I felt very "weird." am i just crazy and imagining things?