Bayley,
I agree with everyone else. Abstinance is the BEST method. But since you've already done the deed, the second best thing for you to do is to take a pregnancy test somehow. Hope4me2 mentioned that you could go into a Wal-Mart, buy the test, take it to the bathroom, and use it. Surely, your parents wouldn't find out that way. And, I'm not saying that you should completely keep your parents in the dark about everything. I was only 18 when I had my first child (I'm 25 now), and I took the pregnancy test in the restroom of a gas station. I know you are nervous...probably a wreck. But if you do find out you are pregnant then I think you should definitely tell your parents. They might be more understanding than you think. Please keep all of us posted on the whole situation! I wish you the best of luck!