Bulldog - here is a pic of the knee and the cartilage you may have torn:
And please, please don't overmedicate with Ibuprofen (or any other pain relievers). Even more critical than your stomach are your kidneys. You can easily cause serious kidney damage (that may or may not be reversible) with too much ibuprofen. Get to a doctor so he can figure out what's going on and put you on pain medication that will relieve your pain without any problems.
That medication is over the counter but it can cause serious problems if not taken like the label says. I just don't want you to hurt yourself accidentally.
P.S. Are you taking 1500 mg at a time?
