You put the apostrophe in the wrong place in Didn't.
Sorry I was only joking, trying to lighten the mood a little. But on a serious note, that looks pretty bad. Its a good job nothing else hit you after you bounced off the central reservation, that could have been really bad. I don't believe in God but someone was looking over you all that day. The main thing, like already said, is that you are all ok. If it were me, I would take the misses for a couple of extra check ups in the next couple of weeks just to make sure. There is nothing wrong with playing safe and if you explain why, the doctors/nurses will understand.
Now go and do the lottery.