Obviously the first thing to do is come off the birth control if you're trying to conceive. You don't need to finish the pack; you will get a bleed a few days after you stop. This wont be a true period.
I would then wait until you get your first real period, then the month after you can buy an ovulating kit from the chemist which will tell you when your fertile time is, and the best time to get pregnant.
I would then wait until you get your first real period, then the month after you can buy an ovulating kit from the chemist which will tell you when your fertile time is, and the best time to get pregnant.