Damn, that's gotta hurt. I cracked a couple, and tore the heck out of the cartilage and muscles when I was in my 20s, and it took two months before I felt 'ok' and another month before I was good. If it happened now, it would probably take 8 or 9 months to heal...
Hope you heal up good, and quick. Rib injuries suck. So, send pictures of the rib steak you made out of that nasty bull!