I can't make specific medical recommendations, since we don't have a doctor patient relationship. But from where I sit and stand, the links in my article, and in the comment section, to any of these would be reasonable places to start:

Gokhale's posture approach https://gokhalemethod.com/

McKenzies back exercise approach

https://www.mckenzieinstituteusa.org/method.cfm

Sarno's mind - body approach to back pain

https://www.amazon.com/Healing-Back-Pain-Mind-Body-Connection/dp/0446557684