Crowdsourcing my health here. Lately I've been getting this sharp stabbing pain that is very sudden, lasts a couple minutes and then fades into more of an ache. It comes simultaneously in my left arm, maybe about two inches above my elbow on the inside/front, and in my chest, on the left side about in the vertical middle of my rib cage right below where I imagine my heart to be. It happens once every two or three days for a little while and disappears for a few weeks.

Thoughts? Do I need to see my doctor, or am I just pinching a nerve by sitting weird or something and I can fix it on my own?