I’m glad that at last thanks to your dentist you have an explanation for your symptoms! Although obviously it’s not great to have ES… Lots of your symptoms do sound like ES, there’s some good info that @GrnyAny posted in this discussion that you might find interesting:
Have you ever been assessed for cranio cervical instability? Your description of feeling like your head not being attached is one that people have mentioned with CCI, & lots have both conditions…might be worth having a look at the symptoms is causes although there are quite a few which overlap with ES.
Hopefully if you see a doctor with experience of ES then they won’t dismiss you; sometimes it’s better to stick to the more common/ better known symptoms like the throat choking issues, pain in the jaw, clicking in your throat, as some doctors even if they’re knowledgeable about ES have quite a set idea of which symptoms it causes and can dismiss the less common ones…
I hope you can find a doctor to help you!