Well...I fell and hit my rib, just under my breast last year. I wouldn't say it was broken, but maybe cracked. It was very, VERY painful. It took a good 6 months to heal to the point that I didn't feel pain. I tried all sorts of things, including an abdominal binder which I purchased at Walgreens. I wrapped my chest with it. Eventually, though, I just lived with it till the pain subsided. A chest wrap may help you. I don't really know. I'm sorry you are going thru this!
Patty