Joanie, he was walking around with a glass drinking glass when he was literally bowled over by a 9 year old boy playing tackle with his brother. He ran right into Austin while he was holding the glass up to his face and the glass smashed into his forehead. The glass itself didn't break, but the blunt impact split his skin wide open. We were told it actually would have healed better had it been a cut instead of a blunt injury. Fortunately he was very young and it has healed well. You can barely see it unless you're looking for it or if he's upset, crying, red faced, then it pops out.
Katie, yes, it's all the what ifs that get you. What if I'd just stayed home? What if I had said no to this or that? Why didn't I take the drinking glass from Austin when I first saw him holding it? It's our parenting choices that come back to haunt us. But like Ash said, you need to be gentle with yourself b/c you did the best you could with what was happening. You will learn from this and next time she is sick or injured you will handle it differently. The important part is that KJ is okay. She has forgotten it already. Now to let yourself move on. It will take some time.