"Landing gear" when you're still high?

Idk I'm kinda naive to all the distinct effects bc I haven't used in a while. Might have to call out of work so I can sleep. My brains already mush and I can feel the beginnings of psychosis so I'm done for now. I snorted a cpl bumps of unknown weight the last 2 nights and just smoked 2 hours ago. I'm already not feeling it. Will Klonipin and melatonin put me to sleep without cardiovascular stress? I don't wanna mix because upper downer but if it's safe and will cure my ailment lmk.

Tldr: I'm wanting to hop off the ride b4 it crashes. Is Klonipin safe when I'm still high?