Best tips for severe insomnia?

The past week I’ve been really struggling with sleep. (I have struggled before, but never like this for such a long time) I’m just not able to fall asleep in the first place, no matter how tired/not tired I am. When I do fall asleep, I wake up around 5/6 times during the night and during these waking episodes I have trouble falling asleep again. No matter how bad my previous night was, the same cycle keeps repeating the night after. Nothing seems to work and I’m starting to give up. It has been another sleepless night for me, where I’m at it’s almost 5am and I’m wide awake again despite only getting like 4 hours of sleep last night.

I have tried every tried and trusted method, like being in the sun, not using my phone before bed, having a cold room etc, nothing seems to work.

Tldr: I have insomnia and I’m looking for some maybe unusual advice that has worked for people