My doctor first gave me a blood test for H pylori which was negative and then after a couple of courses of PPIs (Proton Pump Inhibotors)which didn’t resolve the issue he sent me for a gastro endoscopy for a good route around and byopsies which are better tests for H pylori etc or at least that is what they told me.
Mine started as just feeling really sick in the mornings the then the acid reflux seemed to kick in a few weeks later. In the end mine was diagnosed as gastritis so nothing too serious etc but I did lose an quite a lot of weight.
I certainly had and still have periods of a sore throat but only really in the mornings which is down to the acid flowing back when you are asleep. My endoscopy revealed I had a loose LES (Lower Esophagal Sphincter!)
Not sure whether I am still considered to have GERD or what. For me the PPIs seem to be as much the source of the problem as the solution.
I can’t say mine is completely resolved fine for a few weeks and then flare up for a day or two. Although my appetite has returned and the weight is back up 🙁