what cured my brain fog
just leaving this here in case it helps anyone. it turns out i was gluten intolerant, but without any sort of digestive symptoms. i noticed that water fasting for 2 days helped a little bit with the brain fog and my memory issues, and decided to try the carnivore diet to figure out whats up, and it changed my life. no more forgetting what i was about to say/do, no more weird random anxiety throughout the day, no more being tired in the morning regardless of how much i sleep, etc. its for the first time in my life that i can sit in a lecture and my brain can grasp whats being said.
diet is definitely something worth looking into before you suspect its a deeper problem :) good luck!