Don't worry about it, just don't do stupid things like play soccer or anything where you are likely to hit your head. Most of the time if you do hit your head again it just means more recovery time. There are many many athletes and stupid people like me who just keep hitting their head before they can recover, and while we are hurting, we ain't dead yet So, yes, be careful, but worry is the worst thing for you right now, and sleep is the best thing for you!

(I got 8 concussions in 1 year and have now been concussion free for 1 year!!)

Good Luck, you will be fine!
Margarite