It is useful to think thru the worst-case scenario. The scenario is you might feel nausea
for a few days, you might throw up one night, and that's it. I mean, it's not like you're going to get the plague or something. Kids and vomiting follows like the night the day, so just notice how you do NOT get sick this time, and remind yourself of it next time a child shows signs of illness, and that should keep you from worrying so much.