Hi. I An Taken 2 Nexium Orc 22' Daily For

Hi. I an taken 2 nexium Orc 22' daily for week or so now ..at first I developed s pain in my left knee for a few days and it disapated but now my back ..left side near or on a hip bone that had a piece of bone removed for a broken neck repair surgury.....very intense pain very sharp when moving ,walking ,turning and sitting. Starts and stop abruptly ...any ideas if the pills could cause this?