For the past 2 weeks, every day I wake up, whether I slept on the floor, on a couch, or in a really comfy bed, my upper back KILLS, to the point where I feel like I can't even move. When I force myself out of bed, after a few hours it starts to feel better, and by evening I usually can't even feel it anymore, but then the cycle starts the next morning again. I went to the doctor two weeks ago and she mentioned at that time it was probably just a cold since I had no other symptoms (and other than being really tired and weak feeling lately, I don't other symptoms - throat, nose, etc. are all fine). Any ideas? Could this be stress?