Do your children complain of being physically ill a lot?
My son is diagnosed with PDD NOS. For months now, he has complained of stomach aches, headaches, nausea, feeling dizzy. Migraines run in my family and seasonal allergies on my DH's side. The headaches didn't surprise me. I brought him to a specialist at Boston Children's hospital for the stomach aches and nausea and all the testing they did, just blood tests, were normal.
I don't know if this is anxiety, allergies, or something else. He is seeing a gastroenterologist and a therapist. Should I check for allergies? I suspect that milk might bother him. Sometimes he seems better off of dairy. It is hard to tell what it is all about.