I fell on an icy sidewalk 3 months ago. I landed directly on my right knee, but aside from initial bruising, my knee wasn't otherwise injured. My right hip, however, has given me issues ever since. Early last week, it was almost back to normal - virtually no pain, fully resumed regular activities, etc. Starting last Thursday, it's suddenly become excruciating to sit down. I can stand or I can lay on my left side. The pain is on the outside of the hip and radiates down the back of the leg.