Oh, you're so young. That makes me feel all motherly and want to warn you to be careful, etc. So, please do be careful.
I waited until I was 19 to have sex because I wasn't emotionally mature enough when I was in high school... and I was TERRIFIED of getting pregnant. I wanted to go to college. I had lots of goals and I was determined that an unexpected pregnancy was not going to interfere with my plans. I'm glad I waited until I was ready.