I was bit by a spider that turned into MSRA. I have been taking...

I was bit by a spider that turned into MSRA. I have been taking the med for 9 days. One day 2 I started with a strange pain on the left side of my navel. I went back to the Dr. 2 days later for a follow up to my spider bite and told him about the pain that was getting worse. He had me do a sonogram of my stomach to make sure the infection hadn't moved to my Aeorta - negative result. Then he sent me for a CAT scan of my stomach to rule our a hernia...still no results, but after reading this site I wonder if it is the meds. I also have a stiff neck which I thought was from sleeping wrong and I have had some very weird dreams. I have a follow up with him tomorrow and definately discuss a possible side effect!