Hey, well im 19 and i've had 3 serious boyfriends since I was 14 and always had unprotected sex with every one of them and i've only ben pregnant twice, its a fact that its very hard for girls to get pregnant so you're most likely not, but then again you could be.
Do wat I did, wait til the day you are due for your period, and if it doesnt come then get tested straight away rather than waiting for it!!!!