Carol have you considered seeing a pain specialists for your pain? Since you're still on the same med for so many years maybe it's not effective as you'd like? I too was on Percocet for over 20 years until I looked into a pain management doctor. I was first placed on morphine sulfate for about one year and that effectiveness waned too. I was then placed on buprenorphine patch which works fantastically. it is different from other narcotics like Percocet or T&C in that it works on different brain receptors. Please read the article I've attached below for more info. Buprenorphine pills and buccal film are used to treat addiction but in different doses from the patch. Good luck and hope you find relief, I have.
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4675640/