You must have had a wonderful doctor to take the time to look into your pain and do the necessary testing and imaging to diagnose and fix your problem. I have similar pain due to a ski fall eight years ago. Severe buttock pain going down both legs to the tip of my toes. Do you remember what type of imaging they used to diagnose the nerve problem? I have been trying to get one of my pain docs to do something like that. Makes sense. Meds barely work; pain pump has offered no pain relief. I am at the end of my proverbially rope.
Thanks and best wishes.