Should I get a tetanus shot?!

2 days ago I was at the park and stepped on something sharp. It was stuck in my shoe, and my friend got it out for me. She said it was a fish hook. I saw it and it looked a little rusty. Either that or it was copper, I couldn't tell. It just pricked my foot and there was only a bead of blood, but I'm freaked out that I'm gonna get tetanus. Should I get a shot? The soonest I could get one is Monday morning. Would it be too late then? My parents say I'm overreacting, but I'm not sure. I don't know when my last tetanus shot was. Either it was 7 years ago, or when I was a baby. My mom will check my shot records soon. Also, I can't really see the puncture wound at all. I only know where it is 'cause I got a blood blister there. The area is clean with no signs of infection. I reapply Neosporin regularly, and I keep it clean. Any advice is appreciated. Thanks in advance.