It's interesting that you bring this up. I think I've replied to you about this before, but for sure—the mind and the stomach are inextricably linked.
I believe, and it's been my experience (though I know not everyone would agree with me), that stress and anxiety can FOR SURE cause disorders of the GI tract. If "flight or fight" is the opposite of "rest and digest," then keeping your body in a constant state of heightened alert doesn't allow it to do its job of properly digesting your food. That's why people with anxiety complain about nausea, reflux, heartburn, weight loss, tiredness, funky stools, etc—in part because they're not digesting properly or absorbing nutrients properly. How can they when their blood supply is constantly being diverted to those systems we need when there's (even a perceived) threat of danger? The body wasn't meant to stay in such a state for so long and as such, strange things start to happen.
I went through a similar experience when my anxiety was at its worst, after I'd been chronically stressed for several months prior. I had NEVER had digestive issues, but as the months went on, I started having weird stools, or constipation when I never did before. After that, almost everything I ate made my stomach and esophagus burn. I lost weight rapidly. I was afraid to eat because I didn't know if it was going to make me feel bad or not. The insides of my eyelids and tongue went pale. Most disturbingly, horizontal lines began to form across my fingernails—which later I found out was due to a vitamin deficiency brought on by, you guessed it, poor digestion.
Of course I thought there was something seriously wrong, but what was really happening was that in my anxiety, my body was constantly preoccupied with trying to defend itself against my imaginary threats, and as such, there was no resting or digesting going on. And yes, it did indeed lead to actual, physical problems.
Paradoxically, the effects of stomach acid deficiency are almost identical to an overabundance. Digestive problems brought on by anxiety are, I feel, by and large due to an underproduction of acid in the stomach. The problem is too little, not too much. And I'd be willing to bet money that that's what's going on in your case. I know I've mentioned that to you before and I have an inkling you don't believe it. That's fine, you don't have to. But I definitely think that if you focused on treating your anxiety, and not worrying so much about LPR/reflux and the possibility of having to medicate yourself in perpetuity, I bet you'd find eventual relief as your nerves and digestive system are allowed to go back to normal.