fluxes in cognitive abilities

hello! sending everyone good vibes, if you're in here things aren't that easy so ❤️ i just wanted to ask around if anyone experiences a lot of fluctuation around their cognitive abilities. if im too mentally or physically active for a day or two in a row, i start waking up very confused on the days following. i feel disoriented, and unable to settle down or finish my thoughts in a meaningful way. i keep feeling like i have to do something that i just can't remember what it is so i end up getting agitated and emotional, ill walk around in circles, repeat myself etc i'm often also exhausted, and kind of just have to baby myself with a lot of gentle routines and rest and low stimulating activities until i calm down. it can be days sometime. i will also struggle with all the usual struggles but moreso. does any else experience significant increases in confusion/agitation with more or stimulating activities? i'm trying to figure out some kind of equilibrium or way to pace myself but im struggling with finding a good middle road for myself. keep thinking i can do certain things and ending up a big mess.