Firat of all, it is great to see you back posting in Silver Bloggers.
I feel you and this is terrible, not getting proper sleep is an absolute nightmare and I hope you can find suitable treatment from somewhere. My body has worked on a very little sleep cycle then a day of sleeping from exhaustion for years due to my having Ankylosing Spondylitus. I hope you find something that works, and having seen my mother evolve into a dementia sufferer as a result of type 1 diabetes, not this does not sound like you are slipping into dementia. Keeping my fingers crossed you find some good alternative therapies that work.
Thank you for reading my long post. I, too, hope to find a solution one of these days.