This seems to be a common complaint with hip replacement. I have had hip and thigh pain for 3 years. No one has been any help,they just give me exercises to do. I am not overweight and walk 30 to 60 minutes a day plus my exercises. X-rays and ultrasound show nothing.. Pain killers help,I am taking cannibus oil but docs refuse to give me a prescription so I get it wherever I can.
Hope you can get relief soon,mine is not so bad as yours I think but I get no help either.