What if you ain't had your period for a whole month but then it comes on next month , what that mean ?

Maybe ok; not preg?: A doctor can check to see if there is any real medical issue, if a woman has mild menstrual-related symptoms. Many women have some variation of their periods or a missed period on occasion. Some women feel normal after a few days, but others do have bothersome symptoms or questions, and follow-up with their doctors. A urine pregnancy test is very accurate if done after missing a period.