Hi Mike,
Sorry to read you are still dealing with these issues.
With all that you have been given in terms of strength, stretching, dry needling etc, I am curious if anyone has anyone looked at your breathing.
I am in no way trying to pedal a miracle cure here, and obviously each one of us is different but I had a lot of success with lower back pain with a therapist who focused on my breathing. It may be an avenue to consider if it hasnt been looked at / addressed?
Not 100% a fix for me but helped improved things so as I could focus on other areas.
Hope this helps and wishing you a speedy recovery.