Theres so many level of concussions.
Usually when people feel dizzy or literally puke its a hospital case.
Have you ever hit your head before ? if so , I wouldnt take a chance.
Although you already made it through the night which is a good sign.
Just make sure you tell a friend or your mom about it, and ask them to check on you once in a while.
I smacked my head this year on ice and I slept for 46 hours straight after that, had my sister wake me up every 3 hours or so.
Oh and be careful not to hit it again this week. Its really really bad.