My period is late.. But

Okay so i lost my virginity this passed Saturday (june 4th). No condom, lasted about 1-2 mins, he didnt cum inside me. But i was supposed to get my period yesterday (june 11th). Im not on birth control. Im 15. Ive also read in MULTIPLE different places that loosing your virginity can effect your cycle. I guess my question is has this happened before to anyone? Is it normal? Is my stress making my period delayed.. Help!