I've read through all the comments up to this time (11 p.m. CST on 8/7) but no one has mentioned Baclofen. This was prescribed to me after hip replacement two months after major back surgery (I fell). For quite a while I had trouble distinguishing whether my pain was of joint, nerve, or muscle origin. That said, when I finally figured it all out, Baclofen was and is still, on occasion, a lifesaver for relief from muscular back pain. But I think that your best bet is to discuss the suggestions you've received here with your physician of choice. I sincerely hope you are able to find relief from this pain - it is so debilitating and hard to live with.
Peace and hope, Barb