I'm so sorry to hear that you're having so much trouble with a sore throat! Have you seen an ENT about it? A good ENT can identify LPR/GERD issues and treat them. I expect you've already done this, but it seems to me that throat symptoms are definitely in their realm of knowledge/treatment knowledge.
Good luck with finding relief!
Nissen Fundoplication 2/09
"Whatever you fight, you strengthen, and what you resist, persists.”
“Worry pretends to be necessary but serves no useful purpose”
“Accept - then act. Whatever the present moment contains, accept it as if you had chosen it. Always work with it, not against it.”