Pregnant?!

my period is a week late. i’m on the birth control pill lo lo estrin fe and ive been taking the pills out of order. the last time i had sex was march 6th. we went 3 rounds and he pulled out every time. i was taking my birth control pills correctly during that time period. i took a pregnancy test 2 in a half weeks after sex ( 1day before period) and it came out negative. then i took one about 3 weeks after i had sex (4 days after missed period) and it came out negative. about a week after i had sex i started taking my pills out of order and recently i switched my timing for when i take them. i’ve had absolutely no symptoms of pregnancy. any opinions on this?