Well 16 is way to young to have sex in my opnion protection or not. Im 23 and im not that old and I was 18 when I lost my virginity. My mom would have killed me if I was having sex at 16. Anyways, if you think your pregnet take a hoime pregncy test depending on if its positive or negative, wait for your period if it dont come within 2 weeks of when your sosposed to have it I would go to planned parenthood and have them give you a blood test and talk to them about it they are very good about helping you I was 21 when I had my child and they helped me a great deal even tho I had my spouse with me sometimes its eaiser to talk to a stranger.

...Well first off dont stress..Because if you are pregnant ...You or the baby dont need that ...You need to wait until 4-5 days before your next period and take a hpt...If neg and you still are late with your period...I would have a blood test done with the doctor..They are always more accurate than hpt's...And I know you think oh my parents are going to kill me..Well I thought the same when I found out I was pregnant at 17 but they were mad for like 2 days ...And then were actually supportive and happy about it...So just tell them as soon as you can...And do it in a mature manner....They might yell at first ..But in the end they will all be as excited as you will be!