I totaled my car the other day, and the seat belt seems to have done a number on my chest. Xrays say no broken ribs, but there's a lot of pain. I suspect Costochondritis. The Dr said I have one of the worst seat-belt bruises he's seen. Right now on occasion I hear a thud/pop in my chest from time to time. I suspect broken/torn cartilage. It hurts to do anything that causes my rib cage to flex. Or to put my arms behind my back. But the popping is the most unnerving. Anyone else had this specific type of injury? How long did it last?