I can't fall asleep

I've had serious trouble falling asleep since I was 11 years old. I'm 34 now. When I smoke weed, I can pass out pretty easily in 5 or so minutes, though I can't go to sleep particularly early. For some time I was smoking 2 or 3 days a week. I was then struggling to fall asleep on sober nights, but I'd get there usually. The struggle was caused most significantly by restless legs - a relatively new problem in my sleep troubles. Then I recently got caught up smoking daily for about 5 weeks. WELL, tonight is night 3 of no weed, and it has been fucking hell. (well, tn has been pretty okay so far, but its only 1:50am) My first sober sleep was after an unwanted all-nighter & eventually slept 10am-5:45pm. Then last night was another unwanted all-nighter, and I slept about 10:15am-2:45pm. I've been unreasonably exhausted - like so tired I feel like I'm going to doze off when I blink. But I lie down and can't fall asleep. So when I try, I get into that space between awake & asleep - where I'm…