Brused or cracked, remember, if you don’t fully exhale, you may get some horrid lung disease.
Even if it hurts, breath right out then in a few times to clear the lungs of stale air in a nice moist warm environment….
Also, on your all fours, do superman with one arm at a time (or you may face plant) to stretch the intercostal muscles.
Also, see a physio, last time I thought I’d cracked a few ribs, I suffered for 5 weeks but it didn’t get any better, a few visits to the physio sorted out my dislocated ribs to a pain free (ish) conclusion. Wish Id seem the physio sooner!
In the meantime, carry a towel to wrap around you quickly if a sneeze comes on.
Take Ibruprofen