Pregnant on the pill?

How many people have gotten pregnant on the pill? I personally know way to many girls that have gotten pregnant ON the pill, and that may be due to their own mistakes, however I've seen it being used as a way to help some women get pregnant. My BF and I had been just using the pull out method for a year (I know dumb right?) and thankfully no pregnancies (yay) but to MAKE SURE I didn't get pregnant before our upcoming adventures, I started the pill and now I've seen more blogs of women using it to get pregnant. I don't wanna any babies! HALP.