As a fellow back issue enthusiast I would say there is no answer in medical professionals I have done it all. Ask what exercises and mobility work are you doing, is it enough? Is it focused on your problem areas/muscles? This will solve most of it. Then how much are you sitting?  The how much are you walking? Go sign up for something like knees over toes guy (ATG) and do his basic routine every day you will feel better (there are many others his is just accessible and distilled to very useful movements)