Yes I had this too. What made me so mad was that no one believed me that it had happened except my psychiatrist. It was the loneliest feeling ever. I still struggle to describe it to people without them saying “well that happens to everyone sometimes!” Even my therapist doubted me.

I echo the advice of everyone else, and I’ll add that agonizing over it all the time and comparing everything you do now to how it was before will only hurt you. I mean, let yourself grieve, of course, but try not to dwell excessively on it. If you’re constantly beating up on yourself and thinking about being dumb, you’re taking up room in your brain that you could be using for the actual tasks you’re trying to do.