What constitutes a normal or abnormal period?
As far as the amount of bleeding, please see above. The menstrual interval is defined as the period of time between the START of one period and the START of the next. Off of birth control pills, this interval can vary greatly. Twenty-one to forty-seven days, while a wide range, is considered normal. Women understandably become concerned when their cycles are not as regular as clockwork, but this is usually no cause for alarm, particularly if you have been stressed or ill in any way. While pills and other hormonal contraceptives give more regularity, it is also not uncommon to vary several days month to month. On modern low-dose pills, it is even extremely common to miss a period altogether. If you have taken your pills correctly, there is little likelihood that you are, in fact, pregnant. If you are concerned, contact your doctor or carefully do a home pregnancy test. Be sure to precisely follow the instructions of the test.
