I was scouring the internet to see what reliable sources have to say on this issue -- especially about what one might be able to do on one's own without much effort. Besides the usual biggies, (yes NIH has this to say: Other important treatments include physical therapy as well as cognitive behavioral therapy, biofeedback, imagery, and possibly other forms of psychotherapy and support) have you dug up what is useful? Painnewsnetwork has some info but I'm not sure how reliableb. Wikipedia wud be another source I'd look at. I'm big on basics: wholesome food, physical activity (did u see Elaine LaLaine, at 97? does incredible moves, as new York Times recently covered) and redusing stress. I say this as one who has seen much ups and downs in life and at 80 still able to be fully independent, without any meds, tests, etc. But I do --as you note -- do what gives me pleasure including both mental and physical exertion. wud be good to know your next steps. All Best.
https://www.ncbi.nlm.nih.gov/books/NBK555973/