I went to the ortho Dr. two weeks ago with lots of pain in my knee. He took x rays and told me because of my arthritis I have bone against bone. I needed to have three injections of orthovisc in my knee. It will cushion it. First shot....great I feel better. Second shot on last Monday....even better. Friday at work me knee started hurting in new places. Finished my 12 hour day and went home and sat down. When I got up there was a loud crack and now I can't straighten my leg and it hurts bad enough to wake me at night. I called this morning and I can see the DR on Monday. In the meantime I am taking large doses of ibuprofen and icing it. The knee is swollen and HURTS. Think of me on Monday. I hope it is something simple. Oh, and it's the leg I work my sewing machine foot petal with so I can't sew. Bummer.