Outside Knee

Patient: Had foot surgery to remove bone spur first week of june. July 7 took daughter shopping after getting taken out of boot week prior. Woke next day leg hurt…figured I had walked a lot so just thought leg was sore from that. Knee and leg have gotten worse over this time. Aches terribly each day..can’t get comfortable to sleep. Feels better in mornings..gets worse as day wears on. What have I done?