Generally speaking, if you have regular menstruation, have normal sex life and have not taken any contraceptive measures, you can use a pregnancy test or a test paper to detect your period after 7 or 10 days, and it is better to use morning urine for the test to determine pregnancy with higher accuracy. If the test shows two bars, it is positive, which proves that you are pregnant. If the result is negative, it proves that you are not pregnant. You can observe the test for a few more days and recheck it again at least 3 days apart. Some people have irregular periods and it may not show up in a short time. You can also check the blood chorionic gonadotropin, which can accurately determine whether you are pregnant or not, with relatively high accuracy and earlier than the test paper test. If your period is delayed, it may be related to endocrine disorders, so you can take drugs to regulate your menstruation, ensure balanced nutrition and regular rest.