There are two possibilities-a delayed period and a threatened or chemical abortion
. You can only distinguish by getting a serum beta-hCG measurement, a trans-vaginal sonogram and see a specialist for a proper appraisal of the situation. If pregnancy
has been ruled out, the cause of the delayed cycle could be an occasional deviation from the normal pattern, weight disturbances, hormonal
disorders and stress
or infections. Some medications may also interfere with the menstrual pattern. Good luck.