It is usually impossible to tell if you are pregnant from your underwear, but delayed menstruation and increased leukorrhea may indicate pregnancy. It is recommended to go to a regular hospital for relevant examinations such as ultrasound to confirm pregnancy. If you are of childbearing age and have sex, you can determine whether you are pregnant by observing your leukorrhea, menstruation, early pregnancy reaction, etc. For example, a woman who is late for menstruation and has an increase in the amount of leukorrhea, sticky leukorrhea, nausea, and lethargy may indicate pregnancy, but it is not accurate. So you can also go to the drugstore to buy a pregnancy test to assist in determining whether you are pregnant or not, if you want to accurately determine whether you are pregnant or not, you still need to go to the regular hospital for relevant examinations, such as ultrasound, blood HCG and so on, to confirm whether you are pregnant or not.