I have been on the Aimovig $5 program since I started almost three years ago. I have not experienced the "backing up" problem you noted.

I'm about to blast my neurologist with both barrels for failing to diagnose my autoimmune issues. He was pushing me to get Botox, until I discovered (through a Sunshine-law website) that he was paid $40,000 last year in kickbacks from prescribing it.

I would highly recommend getting the celiac DNA test done, especially if your insurance covers labs. It's a simple test. It doesn't definitively diagnose celiac on its own, but it's a start. If your doctor will also write labs for gluten antibodies, that's even better. The confirmation of celiac can only be done with a sample from the small intestine...I don't recommend that. If your labs come back positive, then try a gluten-free diet. It's the only treatment.

This article will give you a start. There are plenty of references of neurological symptoms from celiac or gluten intolerance: https://www.beyondceliac.org/research-news/neuro-symptoms-gobeyondceliac/

Gluten and Meniere's Disease: https://www.glutenfreesociety.org/gluten-sensitivity-and-vertigomenieres-disease/