He head-butted me in the face at about 8pm last night.
It really bloody hurt and made me eyes water. I felt ringing in my ears for a few seconds.
I've woken up 15 minutes ago and it's still extremely painful, especially on one side.
Do I need to see someone? 
I haven't really had a proper look but I feel absolutely no swelling and don't think there's bruising.
Thank you 