If you haven’t had your period by the time you get your period and you just have a little vaginal bleeding, you do have to rule out the possibility of pregnancy. If you have a normal sexual life without contraception, it is recommended to do a test with early morning pregnancy test paper to find out if there is a positive result, mainly to rule out the possibility of pregnancy. If you are not pregnant, it may be caused by luteal insufficiency, you can take progesterone orally, once a day, two capsules at a time, for 3 days, most of them will get menstruation 3-7 days after stopping the medication. If you do not have a period on the 8th-9th day after stopping the medication, you can use early pregnancy test paper to test again, because the HCG level in your body in early pregnancy may not reach the level that can detect a positive result, so you have to test again to rule out the possibility of pregnancy.