I believe I read you don't tolerate smoking weed or something to that effect. What about THC edibles and/or beverages? I have a terrible time sleeping and look like an extra from The Walking Dead. What works for me, when I can get it, is a 200mg THC beverage + .5 or 1mg of Klonopin (substitute benzo as needed), 6mg of Prazosin, 100mg of Trazadone, 10mg Amitriptaline. I also have this Lavender spray I got from Whole Foods, it's basically an essential oil Glade spray. I use that pretty liberally in my bedroom - the smell is comforting to me.
I've been hanging on by a thread more so than usual lately, and have unfortunately been taking "generous" doses of Diphenhydramine which I do NOT recommend. I take 250-300mg some nights and yeah, it helps put me to sleep, but the more I read about the side effects of constant use, the worse I feel about taking it.
All this said, I'm at a point where I'm like fuck it, I'll take anything to get some real, solid sleep. I hope you're able to get some sleep soon.
A hug.