Many years taking sleep medications

I will be 86 years old in about 3 weeks. I have been taking sleep medications for 24 years. I have also learned CBT-I. That does not get me off sleep medications. Some meds that I tried never helped. Others used to help but don’t anymore. I have been taking lunesta for some time. It still works but not as well as it once did. Many doctors in the state I live in don’t want to prescribe controlled substances, as many sleep meds are, and are the ones that work. If I don’t take something to help me sleep, I’m afraid I would die before I sleep. This has caused me much anxiety and frankly I don’t know where to turn. I don’t know where to go to get off sleep meds and be able to sleep, even if that’s possible. I also have sleep apnea, but a bipap machine takes care of that and it’s not a big problem.
Any suggestions?