it's hard to tell what might be going on without more information. for example if you use any type of hormonal birth control (pill intrauterine device) this can influence your cycle. also if your periods occasionally have been irregular in the past this could just be part of the pattern for you. even if your periods have been very regular it's still not unusual for any healthy woman to experience some variance in her cycle. are you by any chance athletic? are you very lean (have low body fat)? do you have an eating disorder that causes you to be very thin? any of these things can cause you to stop having periods. if you're not having any other symptoms such as fever pelvic pain or anything like that then my suggestion would be to wait it out. if your period doesn't come after a couple of weeks you can make an appointment with a gynecologist for a check-up just to make sure nothing abnormal is going on. hope this helps!
im a 18 year old female and i never haf sex yet and my period is a week late. what can be the problem? . i never had sex