I have been late by almost a month. my mother used to get hers every 6 months... is it genes or am i prenant? i don't have a boyfriend...

Not pregnant: At 14, especially if you've only recently begun to menstruate, it might be a normal irregularity until you 'settle in' to a pattern. If you have not had unprotected sex that deposited fertile semen into you are not pregnant. See a doctor to discover if there is any problem if you are worried. Otherwise, wait and watch. Maybe you're having a similar start in your fertility to your mom. Best!