I had the same thing. In and out of different doctors and all my tests were negative. Went to see a natural Patric and she figured out and helped me by telling me remedies. I started taking licorice root for a month 3 times a day. Please follow instructions if you take. Then I was weaned off the medication my doctor gave me. I went to see a gastro and he said when there is negative results it’s dyspepsia and you need to watch what you eat. I’m feeling so much better with no flare ups and watching what I eat. I do cheat once in a while but that’s ok.
I hope you feel better and this information helps you.