Thank you for all the good tips Mark! I really appreciate that you take the time to adress my problem.

Lately I'm very serious about my sleep hygiene. I always kinda did, but now it is really necessary. I use my bedroom only for sleeping nothing else. Also limited furniture so there isn't to much stimulation. I always go to bed at the exact same hour. No screen time hours before sleep, only some radio for tinnitus. Unfortunatly i can't wear earplugs because of the tinnitus.

I guess i have to find a way to regulate my sleep pattern again. I think when i get over my fatigue, physical excersise will help a lot.
It will probably get better with time and finding what works best for me.

Best wishes