DS2 (7) banged heads with another child at lunchtime. The school called me about an hour later as he felt dizzy/sick. I went to pick him up and his colour was a little high, but no obvious bump/mark. Teacher told me that he had banged his forehead, yet DS is saying that his temple hurts. He is a bit 'spacey' and laying on the sofa. He says he has a headache. Is it worth taking him to A&E to be checked out? Or would I be wasting everyone's time?