Suggest Treatment For A Delayed Menstrual Period

i have a question...i lost my virginity last monday and i have also had sex the thursday after. usually i have my period while my mother is almost done. my mom has been done for about 3-4 days and i still havent had it...and when i had sex, we used a condom and we didnt do it for long just in case as it was only my first times. what should i do?