Hello Betty! I can sympathize with you over back and knee pain. I am in the same boat. For my almost bone on bone knee issues I have gotten shots of Synvisc every 6 months. It works like a charm without the negative effects of cortisone...but it costs.
I was in Holland in May and visited a health store that sold marijuana products. From walking so much around Amsterdam and even from standing still in museums, my back was aching very badly. I asked if some topical CBD oil (without THC which is unnecessary) could help my back. The naturopath salesman said that he could certainly sell me some and make money but truthfully, it cannot penetrate into the back. I didn't ask about taking a pill by mouth.
One thing I do find very helpful is turmeric which is nature's anti-inflammatory. I put some into my morning smoothie.
And what causes inflammation throughout the body?...carbs. So I have upped the veggie intake to 7 servings per day and cut back on anything sweet or too bready.
And of course, exercises and stretches are very important. I visited my physiotherapist last week and she gave me a number of exercises to do which will help as I sail (or limp) into old age!