Period brain fog help

Idk if this is strictly due to my adhd, but it certainly feels connected. The first 48 hours after my period starts I get the worst brain fog. Suddenly everything takes 4 times as long, getting up is a monumental effort, I’m scattered and forgetful and keep zoning out mid task. It literally lifts all at once when it’s over the sun coming out from behind a cloud. It’s a very frustrating two days.

My job is very task and organization heavy, and the brain fog set in today about 3 hours before the end of my shift. Tomorrow is going to be shit. Does anyone have any suggestions for how to deal with brain fog? Also if anyone has advice for how to prep for it before it happens I’d appreciate that too. Since it’s so predictable I feel like I should try to do things before it comes to help myself out