About 10 Hours Ago I Got Hit In The Head.

About 10 hours ago I got hit in the head. Didn't pass out but fell back and was kinda dazed just for a few seconds. About an hour later my head was hurting so bad it took everything in me to not vomit. I'm so tired 10 hours later but can't seem to fall asleep, I'm very nauseous my head is hurting and unsure if my vision is off due to being tired. I feel a lot of what seems like pressure plus pain along the front of my head. When I close my eyes for more than 30 plus seconds I feel as if I'm underwater going in uncontrollable circles. And does not stop right away when I open my eyes.
Any ideas of when all this wil, stop?