A.P.
I just wanted to mention something that most people are not aware of. I have a nerve that runs over my left shoulder blade. I can almost feel were it is on the rare occasion I can get my hand back there. Sometimes it slips out of place and gets pinched. The pain is very scary, because it shoots down my left arm like I'm having a heart attack. I've found that almost hanging upside down helps a lot. I can't afford a tilt table (no room, either), but having the dentist lay his chair all the way back helps a lot, as well as laying on an incline bench at the gym.
There is a condition called "trapped nerve" that causes a lot of pain. Just something else for you to consider, not a diagnosis.