Suggest Treatment For Pain In Thigh And Calf Muscle

i hurt my back about 4 weeks ago tothe point i could barely get up and walk. had xrays clear on back took musle relaxor and anti inflamatory for two weeks back is better but still very weak when strained but my calk musle has become the pain area hurting me when i bend my leg or lay down or sit then get up especially when sitting and getting up it spasms to a pain scale of ten went to er they ultrasounded it was clear sent home with muscle relaxor still hurts and now thigh is hurting help please