For about 6 months now, I've gotten strange symptoms i'd never had before. Chest pains, arm pains, dizziness, nausea, muscle weakness (back of upper left arm/armpit area), sensitivity/tightness in left arm, etc. At first I panicked because I thought I was having a heart attack. The pains come and go. At first it was pressure in chest/heart area and chest pains and constant heartburn. It went away, then if felt like I pulled several muscles on my left side and left arm and chest pains.