It differs from woman to woman. Good luck with conceiving.

Most of the women that have used BC pills for prolonged period of time, don't experience problem with conceiving.
You may try to get pregnant as soon as you get your first menstrual period,that is usually after 4 to 6 weeks after discounting the use of pills.
Some women experience not ovulatory periods for several months, and other cycle disturbances like a cycle length greater than 35 days, and all of these changes are reversible but the regulation can take up to nine months or longer.
It is common for women aged 25-29 who had never had children to have some impairment of fertility after discontinuing oral contraceptives but the effect is relatively short-lived.
You may start charting your cycles right away after discontinuing the pill, that will help you to see when your own fertility returns and can help you see your own post-pill cycle characteristics.
Don't be be disappointed if the first or second cycle after stopping the pill does not seem completely "normal."

Best wishes with conceiving!
Marija