Oh I understand this Facet pain! There nothing like it in all the earth. I am sorry to hear of your plight.
The first step they tried was steroid injections. Some work very well, then others didn't have any effect.
Apparently, that is what happens, but seems to be the ,'first step'.
The next step in treatment was Ryzotomies (hope that is spelled correctly) The procedure is to 'burn' off the Facet nerves. Takes a while to recover, but this was the golden ticket for me. Last time I had this, I had 5 locations done, L4 through S3.
Perhaps you could ask about this, if it is appropriate for your particular condition. It is not a Cure, but does reduce the pain!
When in the change room, preparing for the procedure, there were three of us. We all quickly took the opportunity to share our experiences. It was the best 5 minutes to connect (a little pun) and share our courage. I sometimes think of those dear folk, and hope that they to had the excellent effect that I had.
I do hope you will feel a difference with these injections. It is hard to be in such pain waiting for improvement to hit.
Soldier on! There are other tools in the box to be tried.
Sending you best wishes and hope for better days ahead.
christine