Have you tried "shock therapy" (EPAT: Extracorporeal Pulse Activation Technology) or PRP (Platelet Rich Plasma)? These can help tremendously to decrease pain. I had two sessions of EPAT (each a 15-minute weekly treatment for three weeks) with mitigation of pain and better function six to eight weeks later. After not having been able to walk without severe left leg/hip pain for thirteen months, I'm now hiking the hills in my neighborhood.
Good luck!