Low menstrual blood is not pregnancy, and when you are pregnant, you will not get your period again. If a woman experiences vaginal bleeding after pregnancy, it usually indicates a preterm miscarriage or a symptom of a natal bleeding. Women who experience low menstrual flow may have poor ovarian function, causing insufficient estrogen and progesterone production resulting in insufficient thickness of the endometrium, so the endometrium sheds and bleeds less. In some women, if the menstrual flow has been normal and suddenly decreases, it is probably due to endocrine disorders caused by factors such as overwork or long-term mental stress. Some women may also experience a decrease in menstrual flow due to malnutrition caused by excessive dieting and weight loss. You need to consult a gynecologist for six hormone tests to confirm the diagnosis and treat the symptoms with medication.