Rib injuries are terrible. Just after I joined CM I was a passenger in a write-off car crash. (I posted on here around the time, December 2013 IIRC).
I don't believe I broke any, merely compressed them on the right side where I was turned away to the left and the seat belt (which saved me!) stopped me and pressed them in. A lot of black bruising later on right ribs and sternum, was prescribed codeine and suffered the chronic constipation that comes with 4x a day use, which led to my infamous 'Turd From The Unflushed Toilet' story which coincided with Netent's CFTBL release, hence the association with the unfortunate faecal-looking Netent creature.
TO say it was miserable was an understatement. Merely getting out of bed to use the bog, eating, moving was extemely painful for over a week. A sneeze would have made me scream and I recall the discomfort of trying to stop the uncontrollable muscle spasms that come with sneezing. It took over 4 weeks before I felt confident enough to allow myself a good sneeze without trying to suppress them. There's literally nothing you can do aside fromm stay as still as possible and take pain relief, then wait weeks.