I am miserable with upper back pain. This is the second time in 4 months that I've had this pain. It starts high in the middle - It feels like a pinched nerve. IT's usually worse in the morning, but the pain lessens throughout the day - with movement. But today that is not happening. I am having a very difficult time catching my breath. It feels as though an elephant is sitting on top of my back all the time. There is a lot of pressure just below my shouldser in the middle of my back. I am a 40 year old female. I weigh 125 pounds. I had open heart surgery 15 years ago for an ASD. I have osteopenia. Could any of this be related? What should I do?