If your period is delayed and your underwear is super clean, you may not be pregnant because if you are pregnant, as soon as the fertilized egg is deposited in the uterine cavity, the trophoblast cells start to secrete blood HCG, the estrogen in the body will increase, and the vaginal secretion will also increase, so the earliest symptom of pregnancy in the clinic is an increase in leukorrhea. So if your period is delayed and your underwear is super clean, you may not be pregnant and can continue to give observation. If you still don’t have your period after another 5 days, you can do an early pregnancy test to rule out the possibility of pregnancy. In addition, if the vaginal discharge is significantly less than usual and there is a delay in menstruation, clinically it is important to rule out whether the decrease in vaginal discharge is due to a decline in ovarian function, resulting in a decrease in estradiol.