Hyperfocusing and insomnia in few days before period (AuDHD)

My brain feels switched "on" to finish a given task to the n-th degree. I'm hyperfocusing and having trouble sleeping. It's not mania, because it's not particularly "happy" per se. It's just tunnel vision, where my brain keeps turning a given problem over and over until I find the solution.

I know when I get my period I'll have a sort of mellow calm feeling. Right now it feels like a pointed edge.