I had my surgery on February 9th and over the last 3 days or so I have developed a very bad pain in my upper back. I have read about people getting this pain on their left side, but mine is on the right. I called my doctor and he said it isn't gas but he doesn't know what it could be. Has anyone experienced this pain? It's slightly to the right of my spine in the upper back. It doesn't change when I breathe, it just hurts all the time. It also doesn't feel muscular. It really feels like something is wrong. Has anyone had this?

What did this end up being ?