you might as not even be on the pill if you have unprotected sex with-in 24 hours. like most pills it takes a while to take effect in your system. good rule of thumb is allow a month from time started for it to enter and take effect in your system. until then us a condom.
what if you have unprotected vaginal intercourse within 24 hours of starting birth control? . i took my first pill within 24 hours of having intercourse with my boyfriend. i am continuing to take the pills on my set schedule. what maybe the percentage that i end up pregnant.