I had a nasty month long battle with trimengial neurolagia earlier this year. Mine was caused by an overly aggressive dentist who packed a filling WAY too much. It caused an abcess and was inflaming the nerve. I got lucky (per the specialist I was sent to see) and the abcess popped with dental floss once I suspected it. Ewww. Disgusting, but it DID relieve that particular pain.
Have you been evaluated for TMJ or other dental issues that might be contributing to these issues? Just asking because maybe something there is addressable.
I have 9th cranial nerve issues but mine presents as lost gag reflex, choking, etc. If it is causing pain I’m not sure how to seperate it from the CSF migraines and other crap.
Good luck and welcome.