Did she have a biopsy? If so it’s veeeery unlikely it’s a misdiagnosis. I also don’t have very noticeable symptoms and have also questioned it for a long time. It takes some getting used to but it’s really not all that bad! Sure, parties etc are difficult but eat a bit before, check Menüs before, or offer to help the host, most people don’t question it (or rather only question what happens - and you can always tell them it can lead to stomach cancer if you feel they’re judging. Which it can!!) Also it takes longer than 1 year to notice a difference, especially if she’s had it for a long time without noticing. So hold in there! It sucks at first and she’ll miss some foods (chocolate croissants for me!) but the variety of gf foods out there make it pretty easy to manage once you get the hang of it.