Hello there @maylynn  I'm a slow healer from the UK.  I sympathise.  Despite three endoscopies which showed nothing wrong, I frequently suffered from a very sore stomach, bloating, feeling queasy.   For some time I was taking the wrong iron supplement (Floradix instead of Floravital - the former has gluten in it, but the latter none).  But I would say even very little iron from an approved source made my stomach sore, I think it can be quite irritating. Perhaps that is an issue for you? Oats (the gluten-free pure ones) were an issue for many years (now fine).   Even though my endoscopy findings did not reflect any problems with healing, or any other issues, I self-diagnosed myself with gastritis as it seemed the feeling of nausea and in my case burning in the stomach pointed to it.  I went onto a gastritis/reflux diet and that really helped.   Have a google - there are tonnes online.  That meant avoiding spicy, greasy food, onions, tomatoes, coffee and alcohol.  (Actually, I don't drink, but I did toast someone during that time at a baptism and it set my stomach on fire.)   Instead of drinking strong coffee, I drank water, camomile tea, warm ginger water... so soothing.  I would not go to bed with a full stomach when things were bad, I would let my stomach rest from say 8pm to 8am, which really helped.   My husband and I then decided to buy a new oven and to buy a new dishwasher - we did need new ones anyway.  The new oven had two compartments, gluten goes in one, gluten free in the other.  The new dishwasher was a Miele which does a full rinse with clean water before washing the dishes.  But before I could afford a new dishwasher I would hand wash the dishes and make sure they were really rinsed well, no residue  (unlike our old dishwasher that was really not rinsing well at all). I stopped eating out for quite a few years - I think this is a biggy - although I would have coffee and soft drinks out. Eventually, my levels normalised.  What of the above was the 'silver bullet'?  I am not sure, but finally I did feel a lot better.  Occasionally I will take an over the counter PPI (omeprazole) or a small dose of Gaviscon, but most of the time I don't need them now. I'm not expecting anyone to go to all these lengths, but it could be that one or two of the tips I give you might work.  Don't give up hope! Cristiana

Yes, it would make sense to go mostly gluten free, since it gives your troubles.

Yes, I made an effort to eat extra gluten at least 3 weeks before the endoscopy. I probably ate a some amount in the weeks before that. I had diarrhea, which resolved once I cut back after the endoscopy. So I think it would make sense to go mostly gluten free?  

Yay for the normal biopsy! Thanks for the follow up. Were you eating gluten prior to the endoscopy?

I think that with the elevated antibodies found in past tests, and a negative biopsy, you are firmly in the NCGS camp. If symptoms go away on a gluten-free diet it would be confirmation that you should likely stay on the diet.