Trying to get used to this new format on my iPhone, but here it goes. The medication part sounds good, but if all else fails, what about a scope by your ENT under sedation? If there is anything suspicious they can take a biopsy, even if there isn’t, they can take a biopsy of the affected area?
I see a gastro doctor too, who did scopes also under sedation, due to acid reflux, difficulty swallowing. He did throat dilations, and a biopsy. He found out I had Barrets esophogus, a more severe form of acid reflux, so I take medication for that.
Good luck with everything.