Has anyone tried not counting scary things.
Like sheep, or sharks, or shellfish.
It is vitally important not to count them, simply be aware of them, and where they are, in as little detail as possible.
This is both cognitively exhausting, eventually your brain goes and does something else, and reassuring, as the reason for picking scary things is it's unlikely anyone would deliberately have any in their bedroom.
This may evoke a calming 'I'm all right Jack' response simultaneously with a 'sucks to be you world with all the damn sheep/sharks/shellfish out there', which when coupled with the cognitive exhaustion/boredom, should sent virtually anyone off to sleep, within a year or two.