If you're an anxious parent

How do you turn it off?

I posted earlier about DS seeing bright lights. I called the pedi and she said it sounded like typical toddler imagination. Since he had no other symptoms, we brushed it off. Now, he's been complaining about the sun being too bright when we go out and told me today that his head hurt.

I'm calling the pedi first thing in the am, but I am spazzing in the meantime. I'm convinced it's a freaking tumor and just can't shake that uneasy feeling. I'll be fine one minute, but the next my stomach is in knots and my body goes cold. I can't figure out if this is complete anxiety/a panic attack or what is supposed to be mother's intuition.

As a side note, last weekend I came home after caring for a cancer patient and told DH that I had an awful thought of this happening to DS. I'm so freaked out right now.