Any ideas from what I could be reacting to?--twice now when I've been visiting a person's house, approximately 2-3 hours after, I've gotten severe nausea that lasts 24-48 hours, and a headache in the crown of my head. I can't think of anything that I'm usually allergic to, although I am prone to headaches. I have no personal relationship really with this person--as in no history, it's just someone with a dd the same age as mine and it's a playdate. It happened a week ago and I was mildly freaked out, but attributed it to extremely low blood sugar. Then it happened again yesterday--and it was exactly the same, although we were there for a shorter time, it came on the same way, and has been as severe. No unusual reaction in my kids or dh who was there once.
I googled my symptoms and only came up with a food allergy, but I ate nothing there. Also, the family seems fine--they don't strike me as odd or having anything wierd going on that I notice consciously.