Menstruation is menstruation, and having two periods in a month can be due to irregular menstruation, ovulation bleeding, etc. You can also be pregnant and experience bleeding. Ovulation in the menstrual cycle is the first day of the next menstrual period counting forward to the 14th day or so, this is when some women experience ovulation bleeding, so if it is part of the ovulation bleeding, it is normal. If the duration of the menstrual cycle is less than one month, it is normal to have two periods a month. If the interval between the two bleeds is too short, it may be due to irregular menstruation caused by abnormal hormone secretion. It may also be early pregnancy bleeding. If pregnancy is confirmed through testing, the bleeding may be a preeclampsia and require progesterone supplementation. Two periods in a month need to be tested for HCG to rule out pregnancy, if it is not pregnancy, you can go to the hospital to avoid abnormal bleeding phenomenon.