CANT GO BACK To SLEEP!

One and a half year ago I had very bad job I hated to do being a cashier in supermarket. It was the period when my sleeping problems started. So I wake up 4 in the moring lookin at the clock that I still have four hours to sleep telling myself thats cool being relieved. But then I started ruminating about this thought telling myself: 4 hours I should I have a good sleep before work I have to work and I have to be fresh. Then half hour is passed lookin at the clock telling myself okay I still have 3 hour and a half to sleep still ruminating that I have to sleep have to be fresh to be able to count the money properly. This rumination kept going on for 2 hours when I got so anxious that went to my dad's room asking for some pill to put me sleep. He gave me rivotril (0.25 mg) which he'd been taking for many years. Next day I went to sleep but now took the pill after waking up 4 hours of sleep. Then the third day i got anxious that what if I cant go to sleep at all so i took the pill before i went to sleep and from then on I got addicted to this damn rivotril but I only take it before sleep not after I wake up because It makes me weary during the day.
The problem is no matter how much I take ( 2mg max half a year ago when I went to university) I still cant go back to sleep. Im fed up with this!.
Succesfully I reduced the amount to 0.75 mg and going to reduce it to 0.25 but I still dunno what to do with this going back to sleep issue.
Im generally an anxious type overthinking everything.
The only pill (i literally tried everything) made me go back to sleep was an antipsychotics although that made me very weary during the day and my other psychiatrist talked me out of it since im not schizo or bipo and also told me that they are more harmful to the brain.
I smoked weed for 1 year before the sleep issue and weirdly i could never go to sleep from it, only when it weared off, it always speeded up my brain. I also got two panic attacks from it on one weekend, once on saturday once on sunday and a three days long depersonalization.
Could it alter my brain somehow?
I know this thing is all in my head because i want to force myself to sleep so thats why i cannot.
Any ideas, suggestions, similar experiences?