Docs always take biopsies of the stomach and esophagus whenever they do an endoscopy. I suspect that they can get some insight as to the origin of the inflammation issues with the biopsy. Don't worry. You have a reactive stomach that inflames easily. I'm sure your doc is trying to figure out why, so he can help you.
I agree...docs do tend to forget how easily they can scare their patients, and how important it is to share their thoughts more fully. I hate the way they always make us wait for test results! Their level of concern is not the same as ours, that's for sure!
Good luck with your office visit!