Madbskeller,
Sorry you are still having problems with your buttocks pain. You need to find a physiatrist, they specialize in non surgical options for back pain, chronic pain, etc. They can determine what is causing your pain, your back, sciatic nerve, a tight piriformis, SI joint dysfunction, tight hip flexors, etc.
Until you know what is causing your pain, anything a Dr does in only a bandaid.
If you do not know where to start, call your GP/Primary and have them start the investigation into what is causing your pain.