You were on the pill for quite a while, so it will take quite a while to get back to your natural hormonal state.
Now, it takes most healthy women, who have never used birth control, up to a year, and sometimes longer, of actively trying to become pregnant.
Do you know your ovulation cycle? Do you completely understand the complexities of ovulation and fertilization?
Check this site out. It may help you.
http://www.ovulation-calculator.com/conception.htm