Hi Valis - it could also be only a rib pulled out of place by a spasm in some muscles. That's what it sounds like to me, though as you say, you landed rather hard. Don't you take your calcium and magnesium man??
But anyway, hopefully if it's only a rib "out" you can soak in hot water to soothe and increase blood flow. Ice at night should reduce the swelling. Aspirin reduces inflammation which is important too. And lots of whiskey of course!
(Then see your chiropractor to pop it back in.)