Before four months, I did a couple of heavy things, about a week later, when I put my head down or looked down, I noticed a twinge in my back, on the left side of my right shoulder blade. As weeks went on, it became awful and more painful. I also had spasms on the right side and under my right rib cage. At times it is unbearable. The right side has improved a bit. Now, I feel pain and catch on the left side of my spine. I also have pain in my whole upper back and underneath both the rib cages. It even hurts to cough, walk or move. I have no fever or problem in breathing. My appetite is good. I do not have insurance. What could be the reason?