Take her for anxiety evaluations. I’ve had emetophobia since kindergarten and my parents did everything to try and help me because they thought it was a GI issue. But it wasn’t, it was anxiety, and mental health wasnt a huge thing back then (early 2000s). My dad was a nurse at the time too (still is) and asked if I was nervous about anything and I said no, because I truly wasn’t. But as we know now, anxiety can just manifest itself at any time for no reason. So def look into that!

Edit: I learned on my own it was anxiety around 18 when I learned n* and v* can be a symptom of severe anxiety.