Brain fog! Yep I get it after my migraine attacks. Often lasts days after my other symptoms have disappeared- and is often one of the first signs I get when another wave is about to start. I notice it as I am usually a very quick thinker, I’m a Mensa member and often do their puzzles and quizzes- I’ve no chance following an attack! Following an attack I often forget things, struggle to choose words when I’m speaking and find it difficult to sequence tasks. Before an attack I find my brain feels slow as if I’m “thinking through treacle”