I've been on birth control for about 1 1/2 months, and i had sex with my boyfriend without a condom.
Im only 16, and i am scared too, im not ready to have a baby.
I wasn't sure if my birth control was working, but like people said..its 99% effective, and I'm just going to have to trust it.
And...since i take it the same time everyday, i think I'm fine. So, advice, JUST TRUST YOUR PILL. If you take it within the hour your supposed to, then its okay.
i hope i helped!