Hi mikeg,
I’m sorry for your current pain & other symptoms. I agree with Jules. It sounds like perhaps your styloid wasn’t cut short enough or there is regrowth & that intraoral surgery just didn’t allow the doctor enough access to your styloid so it could be more completely removed. Since your ligament is still in place, it’s a distinct possibility it could have some calcification on it which is what you’re feeling when you palpate that area in your throat. That could also be causing problems. Short of getting a new CT there is really no other way to see what’s going on there. I’m surprised your GP isn’t being more proactive on your behalf. It’s not like he has to pay for the CT himself.
I’m sure it’s inconvenient for you to go out of state to get another opinion, but at this point it would be worth the effort. There is a doctor in Nebraska (Dr. Coughlin) & one in Colorado (Dr. Hepworth) who have both done successful ES surgeries in the recent past. You could try contacting one of them. Here’s the link to the current doctors’ list: US Doctors Familiar With ES, 2019
I do hope you’re able to find a doctor who will further pursue the cause of your symptoms.