I Fell About 7 Weeks Ago Whilst Walking My Dog.

I fell about 7 weeks ago whilst walking my dog. I put my foot out to steady myself but the foot landed in some mud and slipped out in front of me, resulting in a half split position. I am in some pain in my buttock and back of the thigh, but mostly the buttock, especially when getting out of the car and bending down. It does not hurt to walk, unless I have going up hill or down hill. What have I damaged?