I received an injury to my back 3 yrs. ago, through all kinds of testing nothing was found but severe pain continued along with trouble breathing an SOB, on top of this I believe I developed shingles in this area . All Dr. could do was supply me with Percocet, I didn't do well with any other meds to treat nerve pain. I finally asked for a nerve block in my back that instantly took away the knife sticking in my back pain. and proceeded to get off the Percocet. 3 weeks later I started therapy for all the knotted up muscles in my back, well this started some whole new issues. I made a trip to the ER last week with my o2 sats 91% and feeling as though I couldn't get enough air in. They put me on prednisone 50mg and back on Percocet this has helped temporarily but I need an answer to all of this any one else out there with these same issues?