I first experienced persistent stress/panic disorder symptoms after a panic attack in 2014. (At the time, I had no idea it was a panic attack.)

I had brain zaps for weeks after that, mostly at night in bed. Someone in this topic described them as feeling like "degaussing your brain" which I very much relate to.

They didn't bother me much compared to everything else that was going on, and they eventually went away. It was a rather spooky feeling at first, though.