Re: Severe stomach pain-Doc says pulled muscle?
I've actually heard of someone breaking a rib while having a severe coughing attack. It certainly wouldn't hurt to go to the ER. At least they will likely do a wide variety of tests, including an Xray, which will show a cracked rib. If you have inflamed rib cartilage, or a cartilage tear (won't show up on an Xray) then is surely can take many months to feel good, let alone heal. It's a tough area cause we move so much.
Get it checked out... good luck.