Same! I was on a road trip in Ireland and it came out of nowhere. Freaked me out. I’d never had one until a few months after my first bout with COVID. Now I get them but usually only if I’ve not been drinking enough water for a few days, and ONLY when I stand up. It’s preceded by a weird sort of throbbing where it feels like sound is turned down in time with my heartbeat.

Oh shit. I thought it was a community until now!