Ava has done the same thing! We took her straight to the doctor cause dp came home and I was crying hysterically, ava was walking around like err wtf are you crying about mum lol. So we took her to the doc and they said if you picture a band around their forehead and to the back of their head that's the strongest part. The temples and the back bottom of the head (near your neck) is the part you don't want to hit. THey sat there pushing on this massive purple egg and ava didn't even flinch. It' was a hematoma. All they said is keep her up for like maybe 1.5 hours not to let her sleep and just keep an eye on her. If she starts vomitting blood or anything then take her to the hospy