When I had a sore throat that wouldn't go away, it took me awhile to realize that I was having reflux of stomach acid into my throat that was keeping my throat sore. (A great big DUH on my part, because I knew I had intermittent reflux, just didn't realize how it was manifesting itself!). I started on Mylanta and Prilosec, and the sore throat went away. Hope you feel better soon!