It sounds as though you are having NERD. I started with a sore throat burning mouth, chest pain, felt like an elephant sat on my chest, this eventually led to normal reflux and now a failed LES.
I would suggest getting a manometry and PH test done, as this will show of you are having weak acid or alkaline reflux or a mixture of both. It will also show your LES resting pressure.
My advice would be to use Gaviscon Advance at this stage and do a lot of salt gargles.
All the best