I haven't been officially diagnosed but I just thought I'd reply to let you know I'm going through the same thing and last time I talked to my doc she mentioned possibly doing an endoscopy which makes me super nervous. However, a good friend of mine told me she had one and told me how it was, so that made me feel better.
I have also been dealing with all sorts of stomach problems this past year, probably made worse by stress and anxiety. And actually I recently saw this article about "pandemic stomach" (stomach problems due to the stress of the pandemic and everything going on) and the scarcity of antacids now (ugh lol)
https://www.nytimes.com/2020/12/08/b...d-to-find.html
I have gone through the worry of stomach cancer but what makes me feel better is knowing that is probably the least likely and most rare cause. Heartburn is very common, and I do know a lot of people live with chronic gastritis.
Sorry if this isn't much help, but just know you're not alone! It's good you contacted your doctor