Not sure if I should be concerned at all. I have had mild pain in the lower right side and back for about 2 months. The area of tender soreness is near the bottom portion of the ribs on the lower right. Last week I had a fever (102) and pain that felt like mild heartburn added to the mix in the right side of my abdomen to the right of the belly button. I know I shouldn't have done it but I found an old prescription for Sulfameth I had and took it 400 mg 2x day and fever was gone the next day. It's been a week and I have constipation and that's highly unusual for me. Have not taken the Sulfameth for almost a week now, not on any other melds except Plavix and lisinopril. Pain tenderness on right side near bottom of rib cage continues may not be related but is still there too. Doc said rapid flu was negative and scolded for self medicating with antibiotic labs showed somewhat elevated Monocytes and Eosinophils ...all other labs normal. Any ideas or is this likely nothing ?