First of all, wash it with soap and bandage it, and tell your parents или friend about it. then Ты could consider getting a tetanus shot, but i dont know much about it. its probably nothing, but Ты could still get it checked out.
It's good Совет to clean it and put a bandage или bandade on it. If niether Ты или your parents remember when your last Tenus shot was, then it's better безопасно, сейф and get one than to be sorry later.