Body snatchers. Soul scalping. Consciousness hijacking. Cloning. Droning. Soul traps. Time loops. Demonic possession. AI takeover. Genetic enslavement. Lots of grim possibilities out there. Not easy stuff to sleep on.
dont know if you are religious..
i pray when i go to bed...one thing i ask for is for god to send an angel to protect me through the night from evil...it works for me.