I have the same or similar! The pain came on with a vengeance last fall. OMG - I couldn't even sleep. I have degenerative disc disease and so everything is falling apart in my spine and I get severe nerve pain from my sacral joint to my foot on the left. So i can tell you to find an excellent MFR therapist. (look it up here or on the internet) and read the book "Outlive" by Peter Attia if you read and like technical stuff.
I know everything originates from my deteriorating spine. I just had a GREAT SUCCESS - after dealing with all of this for well over 20 years. And that was to return to EXERCISE. Last night I had my first night of continuous sleep after starting to really exercise this week starting from nothing. I owe it all to the book getting me started again. I am very excited. Oh - and ps @travelinman THAT was what I was told - they couldn't do the ablatia where I had the hardware (ucsd - you don't happen to be there?) it is entirely NOT true as my surgeon and outside pain management doctor confirmed! Don't buy it. I had an epidural/with cortisone that located my newest intolerable sciatic/to leg/to foot pain and got rid of my pain for one month. That gave me the impetus to try a more aggressive exercise plan and I'm hear to tell you it worked! First night of continuous sleep. Took about 5 days of exercising to get to a point where there was a change. So happy! I hope it works for you too!