I am so sorry to hear the dreaded diagnosis, ‘ this may be the best you’ll ever be’. After 2tkr on my left knee and one arthrolysis, I live in pain ranging from 6-8 everyday. I do pt 3x a week, but it does nothing for the pain. Nothing does anything for the pain. Rainy weather makes it worse, standing makes it worse, activity makes it worse. The only thing, and I mean only, is medical marijuana tincture that I use only for 7 hours of sleep. Luckily my state has legal medical marijuana. Without sleep I could not live, but I find that I yearn for 8pm and my bed more than daylight. It’s a sad way to live.