Oh wow. I'm going through the exact same extra stuff you've mentioned. Its so hard to explain to people the mental process slowing down, but its exactly like that. I hope you can find out a way to help it, I was on propranolol and topamax for a little bit for migraines but it feels like its made all the brain fog worse even after stopping both.
Its, a journey, for sure. I hope we can both pull through.