What are the chances of pregnancy?

Hey, Im on the birthcontrol pill (I have been for 2 months) & I take it the exact minute at the right time everynight.
And when me & my boyfriend have s*x he pulls out before he cums.
I know we should also be useing condoms, & I have some, but are we safe enough
with the birthcontrol pill & the pull out method?
What are the chances of pregnancy?

If you take the pill every single day and at the same time every day, then it is about 99% effective all on its own even if he ejaculates inside of you.

If you ever forget to take a pill, then you might want to use a condom for backup.

I have been on birth control pill for about 4 years and it's better if you did use a condom but I live with my boyfriend now and it's about a year and we don't use condoms and I still have not gotten pregnant but their is a chance that you can get pregnant..