Had An Unprotected Sex With My Bf And Took The

had an unprotected sex with my bf and took the postinor2 and guess it was effective because i bleed like almost 5days, its been 5weeks time and no mentrual cycle. i had sex again 2days ago but the condom slipped n some cum spilled around my lips but outside the vargina, can i get pregnant? or should i take the pills?