What Does Brain Fog Feel Like?

i have had some pretty intense periods of my life with the kind of thing that i would identify as brain fog. My research, or what i want to talk about, was de personalization and this idea of feeling like disassociated from yourself. I don't think i've had covid. All i mean is, like, i understand what you mean sometimes. And it's just like being exhausted in stuff. But i've also had this weirder, the thing where i'm not tired, i'm not esarily overworked or stressed, and yet i feel disconnected from my own body and mind. Ya. And i've been there beside happeni doo mi o, ok