lost virginity and skipped periods

ok so my boyfriend and i had sex for the first time on march 15th and then again on the 23rd. both times we used condoms and he stopped before he ejaculated. but my period is rather late.

i mean i talked to my best friend and she said she skipped her period 2 months after she lost her virginity.

is it possible that im just skipping a period? cause im 100% sure im not pregnant.