It's quite normal if the pencil case had a 4lb lumphammer in it :)
if there was a lead brick inside the pencilcase then yeah if not mmm not really , look for small puncture mark on top of head , maybe from sharp ob<x>ject inside pencilcase
How big and heavy was it? Lol @ TheDaley1!
This is no joke. If you feel dizzy go to the doctor as soon as possible. If your pupils are dilated, especially if one is bigger than the other go to the ER. Head injury is nothing to mess with. And it can happen in the most odd ways. So go get checked out. Dizziness is not normal. And can indicate something serious. I would go tonight. But that's just me.