On birth control, boyfriend came inside me 11 days after consistently taking the pill, should expect period to come today but what if it doesn't?

Consider a preg test: A urine pregnancy test, done correctly, gives a reliable result 3 weeks after sex (3 weeks after when conception might have occurred), or 1 week after missing a period. If done sooner, a positive result is likely real, but a negative result may be due to testing too soon, and thus lead to a repeat test. If a woman gets her normal period month after month, then she is not pregnant.