I was in an auto accident over a year ago where my vehicle (driver side- driver door) was T-Boned.  At the time, I felt the pressure hit my left flank that felt like a broken bone.  After all x-rays came back negative for broken ribs, the doctors determined the damage must have been to the muscles in my ribs.  Now, over a year later, the pain is still there.  Is that common or could there be something else going on?