It is not normal to lose your period in two days. Normally, menstruation lasts 3-7 days. If you lose your period in two days, it may be due to polycystic ovaries, endocrine disorders, frequent late nights, malnutrition caused by excessive dieting, anemia, taking birth control pills may also cause menstrual disorders, gynecological inflammation, uterine adhesions, damaged endometrium, uterine cold caused by cold during menstruation, stagnation of qi and blood caused by anger during menstruation may cause a decrease in menstrual flow. Menstruation in two days need to go to the hospital for a comprehensive examination, you can do ultrasound examination, routine examination of the white belt, routine blood tests, identified under the guidance of the doctor reasonable medication to regulate, if it is anemia need to take Agaricus, you can reasonably take motherwort, biochemical granules to promote the increase in menstrual blood, usually good contraceptive measures, can not often use the pill, to ensure adequate sleep.