Suggest Treatment For Severe Pain In Hip,thigh And Groin Area

I am a 70 year old white male and I have been having considerable pain in my left hip, thigh & knee (I believe these last 2 could be referral pain). 2 1/2 years ago I fell with a ladder approx. 7-8 feet; broke my r/tibia and damage to tendons in r/ankle. I landed on a stack of cardboard boxes and a few months later, I was having lower back pain when I went in for carpal tunnel surgery on my r/wrist. EMG & xrays done and Ortho dr. then suggested I had possible pinched sciatic nerve. I have been to 4 other doctors since including two spine surgeons - both suggested my pain was in my hip & not the back. I underwent 6 steriod injections (1st no results, others good) and the last test was for trial blockage for nerve ablation. I walked into Pain clinic dr.s office with about a pain level of 2-3. When done, I walked out about a 12. Next day was having severe groin pain & started experiencing electric shocks down left leg right after standing up. He volunteered to try it again & I refused. Pain has progressed tremendously since. Last spinal surgeon I visited said he saw nothing that would require surgery so sent me to 17 physical therapy appointments with emphasis on the lumbar region & exercises at home. PT worked on my hip and I felt relief that I had not felt in several weeks. The electric shocks are gone, but now I experience a tingling like a part of my body was asleep & waking up. This was not to last though. I finally got an appointment to see about my hip and the xray showed negative results. Was sent to a general surgeon who ordered a total body bone scan. Scan results I was informed showed white spots on my left leg - general questions about past injuries, etc. All were negative. I DID HAVE prostate cancer and am 6 1/2 years in remission after 38 EBRT treatments. Last PSA exam 11/2013 was 0.14. I have heard of prostate cancer metastasizing to bones; just unsure since PSA level is low. I digressed from limping to a cane and now a walker. I can barely make it across a room without pain. Dr.s have me on Ultram 50mg (3x daily), Hydrocodone 5/325 (2 x 4 hours), Diclofenac 75 mg (3 daily w/meals), Gabapentin 100 mg (x 14 daily). Nothing is really touching the pain. This pain has only gotten worse over the last 5-6 months and I have lost 95% of my general daily living abilities. I can no longer even drive since last month. I have an infrared heat/vibrator, that I use for heat only and apply that to my left upper and lower hip and occasionally groin area for some pain relief to get to sleep. I wake up at night after the RX wears off & have to get up and take 2 more Hydrocodone tabs; then use the heat to relieve until I can get back to sleep. I have many people from different congregations/churches/family/friends praying for me. PLEASE CAN YOU HELP ME?