How to stop GERD coughing?

I'm a 49yo female, very active, Kindergarten teacher. I've been on PPI's (all types) for 14 years for what I've been told is GERD and Barrett's Esophagus. All was managed until this past November 2022. Out of the blue I started getting stomach pain that was different than I've had before (no coughing) at that time. However, the past 2 years when I have gotten a cold/cough (I usually get one twice a year as a K teacher) my cough has lasted for about 1.5 months, even with medications. Anyways, saw my local GI dr and they were not helpful at all. Went to Mayo in Jacksonville in March for a week and had a slew of tests done. Went back last week for more tests. I'm in the middle of scheduling more tests for next week (transnasal 24 hour ph study, OFF of PPI's., CT for kidneys, possible colonoscopy again). Most of my findings have been unsubstantial. Low Vit C and Selenium. Right Renal artery aneurysm 14 mm (redoing CT scan next week for this). I had 2 colonoscopies so far in the past 6 months and she ordered a 3rd one but I'm challenging her on that. Esophageal wall thickening with small hiatal hernia. Hill Grade 3. Anyways, in our follow up last week when she ordered all of these new tests-it was the first time I heard her bring up surgery. That's all she said though. But now I've also developed a cough over the past few months, which I believe to be 'GERD cough'. It's awful, it's daily, and it's all day long. I do everything I'm supposed to-take my meds, no caffeine, no carbonated drinks, I have an adjustable bed, so I sleep upright on my back every night since this all happened in November. I only wear dresses or very loose fitting pants that sit at my hips-nothing constricting. I drink tons of water, I don't drink when I'm eating, I eat smaller portion sizes, I've changed my diet since this all started and am trying different things to see if anything helps, makes it worse, etc etc. I have tongue sores, nodules in the back of my throat, ringing ears, and I've read about other people having these symptoms along with cough if acid is being breathed in. But it's exhausting. This whole experience has been awful and exhausting, but the coughing is killing me. Does anybody have any tips and tricks to help? I've read through tons of the forum stuff and haven't seen anything different than what I'm doing.