Mafre - Having your styloids poking you in the throat/tonsil area is most likely what’s causing the burning. Many ES patients are diagnosed w/ acid reflux & treated for such when they don’t have it. The throat & mouth are often “victims” of ES symptoms because they’re innervated by cranial nerves which are in turn being irritated by the elongated styloids &/or calcified s-h ligaments.
I’d call the GP & firmly let him know you want your ENT appt to be about ES. Optionally, you can try requesting the ENT doc to explore that possibility in the absence of your GP’s request.