It doesn't matter what your story is, when you had your period, how many times you had sex, if he did or didnt, if you're on birth control, whether or not the condom broke, or anything. You always have a chance of being pregnant, and that's exactly what we're going to tell you. So before you post, test! You can test 4 days before your first missed period, so don't ask us your chances of being pregnant, just test!!
Common things that can mess up your cycle:
1) stress
2) starting birth control
3) stopping birth control
4) switching birth control methods
5) puberty and natural horomonal changes
6) not eating enough or dieting
7) taking horomones, steroids, or other prescription drugs
8 ) illness
other facts about pregnancy:
you can get pregnant on birth control.
You can get pregnant while using a condom.
You can get pregnant if he doesn't go.
You can get pregnant while breastfeeding.
You can get pregnant on your period.
You can get pregnant the first time.
You can get pregnant any time of your cycle.