LO (3.5 yo) woke up vomiting one night 3 weeks ago. She threw up 7 times, every 20 minutes. No fever. In the morning she seemed fine. Last night she did the same thing and she seems fine this morning. She's staying home from preschool and will be watching a lot of TV with dad today.
Any idea what this might be? Just a coincidence that it was similar and close timing? Last time none of the rest of the family got sick (hopefully we don't this time). I want to make sure it doesn't sound like a food allergy or intolerance that I should be tracking.
LO started preschool after the first incidence so if the root cause is the same I don't think it's related to any particular practice at preschool (packing lunches, bathroom hygiene, contaminated water cooler were all on my mental suspect list).