Susan - Sorry about your unfortunate exposure.
I do not have Celiac disorder, but I did tested positive for gluten sensitivity many years ago when I had my first series of Genova Diagnostics' NutrEval assessments. It was a surprise as I had no obvious symptoms or reactions to gluten-containing food.
What I learned early on is that you can't really trust restaurant foods unless they are totally 'plain' and have no sauces or coatings, flavor enhancers, etc. Commercial preps of various sauces and flavor enhancers, MSG, are often used in restaurant food. For that reason, I learned to select only the most 'plain' items and for salads, I requested only oil and vinegar or lemon. There are some restaurants that claim to have 'certified gluten-free' kitchens but in my area, I've not seen many.
Jackie