Are you sure the burrito was gluten free. She makes a few varieties including organic and gluten free. All sold in the same area.
I was about to say the same thing. One time I bought a handful of their gluten-free burritos (which are awesome by the way) and almost bought a regular burrito that had gotten stuck in there. Also the stockers at my store like to shove the gluten version in the gluten-free spot when they aren't paying attention, especially with brands that have a gluten-free/non-gluten-free version that look similar this could definitely cause a mixup.
I looked up the tigers milk bars online and was only able to find very outdated information that said only some of their flavors are gluten-free. I would write the company to check in on that. If they are made on the same line as bars containing gluten, there could be a CC possibility.
And then, like you said, it could also be just from eating food that is not your norm. Hope you are able to bounce back soon. I am unable to advise on how to bounce back, I get atypical reactions.
I am my husband's "Silly Yak Girl"
I was diagnosed with Celiac Disease in January 2013. I also have Lupus and Common Variable Immunodeficiency(CVID) for which I am on IVIG.
Celiac.com - Celiac Disease Board Moderator