I can sort of relate to this. It’s been years since I’ve had one but I used to get migraine headaches severe enough to have stroke like symptoms — partial blindness, numbness on one side, that sort of thing. But the weirdest symptoms were related to words and speech and reading. I could look at a word on a page and could tell you what letters were in it, but for the life of me I couldn’t tell what the word was. It’s like it wouldn’t congeal into a recognizable whole.