In April 2014 I woke with a sharp pain in left lower quadrant of back. Pain is now chronic ache across entire back with sporadic knife-like stabs under right shoulder blade. Have had mri, phys therapy, and diagnostic injection in spine with no dx to date. It feels like muscle strain, especially when moving or trying to get up. Acetometaphin and heating pad allow sleep. Could this be fibromyalgia or if not, what? Local doc has no answer. Oh, I am 71 years old with mild chronic kidney disease. I just want to relieve the pain. Thank you.