You are still young enough that your period may be slightly irregular. However, not getting it the same day every month is normal or even the same week so I wouldn't worry about that. Just in case, you could see a physician.

I have never had a regular period it always seem to just come when ever it wanted to. But i never missed a month. Are you the right weigt for you height? When i was a cheer leader, i remember them saying not to get to skiny because if you dont have enough body fat it may cause you to stop having your period.. but im not possitive if its a fact or not, i would go see a gyno just to be safe.

Good luck!

Hi,

During the first 2 years after getting the first period, most girls won't have regular periods. Our menstrual cycle is actually at an average of 28 days, it may be more or less. So we don't really have periods at the same day of the month unless your cycle is 30 days. It will help making a diary of your periods, just write down the first day your period comes (which is the first day of the cycle) and then write down how long the bleeding lasts. Do this for a few months then count the intervals from the first day of one cycle to the first day of the next cycle.

If it is really irregular (the intervals are not the same for each month) then consider other causes. If you're sure you're not pregnant, then other causes of missed periods in your age group includes poor nutrition / diet, obesity, too much stress, too much exercise. The more common cause, and we see this a lot, is polycystic ovaries syndome (PCOS). If you have a family history of diabetes, insulin resistance, you may be a candidate. Some of these patients are overweight or obese with signs of hirsutism (too much facial hair / unwanted hair for a girl, deep voice, etc). This is easy to eliminate, just have a transvaginal or transrectal (if u'r still a virgin go for transrectal) ultrasound.

Go see a gynecologist for a proper consultation. The menstrual diary will definitely help.