Number 1 there is no reason not to try Melatonin, it’s OTC and offers some people a lot of help, 3-5–10mg are usually easy to find

When someone has ongoing insomnia there is really no Med that is going to just immediately work and consistently work right away. I would imagine your body has a higher than normal inflammation levels , insomnia is often also caused by the “ fight or flight” and it takes time for your brain to realize that it doesn’t need to be on high alert. My body actively rejects sleep ,

I have also had trouble anytime I am receiving anesthesia, I take at least double the normal amount used to intially knock me out and keep me under, I advise anesthesiologist everything I have needed surgery, most think I only “think so “ , but every time after surgery they come to me asking a gazillion questions.

Regardless if you sleep or not it is important to truly just lay in bed at least 6 hours and allow your muscles to relax, your eyes closed, insomnia often has us online, watching tv or reading sometimes 24+hours, they need closed and not needing to focus on anything.

I’m sorry you struggle with this ongoing stressful situation. You are likely getting what’s called Micro bursts of sleep and no know it tho.

When you lay down just throw your hands up and say “ I’ll sleep or I won’t” and honestly mean it.. your body has shown you over and over that a point comes where you will indeed fall asleep, so use that as a bit of comfort to yourself.