Body blues

My stomach has hurt for the last 2 days and I'm headed in to see my primary care doc this afternoon. My right knee has been tight and painful for the past few days, too. After having had my left ACL reconstructed, I don't want to play around with my knees. It would just about kill me if I had to stop working out right now. I'm trying to not freak out - I'm planning on her telling me that a little ice and some ibuprofen will fix everything.