I'm glad you're feeling better. I just went through this myself, after a trip to Mexico (but I got sick on the airplane on the way home, I was fine in Mexico), and I had read up on the issue and talked to my doctor before we left because I'm pregnant and I needed to know what foods to avoid, as well as which kinds of illnesses were going to require a doctor's visit, and which would just require adequate hydration. (I get sick every time I go to Mexico, no matter how careful I am, so I was probably a little paranoid.)

Anyway, what I found is that while there are lots of different food-borne illnesses you can pick up, and some of them are very serious, what you actually get is almost always norovirus. And most "stomach flu" episodes are also norovirus. And so are most cases of "Montezuma's revenge" or traveler's diarrhea or whatever. The vast majority of the time, norovirus is the culprit, whether you get it from your significant other or from a food worker who didn't wash his hands. So whether it's food poisoning or flu isn't really a question, because they are the same thing.

And hoo boy, did I get it. I'm still down eight or nine pounds from my pre-pregnancy weight, and I'm 15 weeks along. (Some of that was morning sickness, but mostly it was the stomach bug.) Fortunately the baby is fine, but two weeks later I'm still not quite myself.