Thanks @Bejeeber and @BoscoPiko. Yes, had a CT and blood panel but nothing to report. The doctor and nursing staff suggested it was an anxiety attack but I’m skeptical - I’ve never suffered with anxiety before and having had CH for many years already, I’m not worried during attacks as I know they will resolve soon enough. Moreover, I don’t think I’d be capable of anxious thoughts as the pain is more or less the only thing you can think of. Overall, the doctor was quite dismissive because she said it couldn’t be a seizure if I was aware of what was happening and not a stroke or TIA because the CT was clear.
I’m waiting for an appointment with a neurologist because I’m interested to see if they have any theories.