I'm also 66 yo and have had pain for years. It isn't at bad levels every day, which is good, but it's a combo of fibromyalgia, migraines, arthritis, costochondritis, and just the 'regular' aches and pains of life at our age. I also have CKD (life-long high creatinine levels) but it isn't bad (yet!) I get by with two naproxen sodium twice a day, and for those days when the arthritis/fibro is screaming, I add two extra strength Tylenol. My most recent blood tests came back with mildly elevated GFR, but creatinine levels were normal (which was a huge relief). My doctor has advised that the naproxen/Tylenol combo is as good as opiates, without the addiction issues.

I hope some (or any) of this helps, and that you find some relief.