What’s wrong with blood in the white blood but no period? There are several reasons. First of all, if you have sex and have regular menstruation, and this is the only time you have this condition, and you did not take birth control during intercourse, there is a possibility of pregnancy. In some cases, there is a small amount of bleeding in the early stages of pregnancy due to pre-eclampsia. So in this case, it is usually recommended to buy early pregnancy test to see. If the possibility of pregnancy can be completely ruled out, there may be some reasons such as irregular periods, delayed periods or cold. Therefore, it is generally recommended to keep warm and not to get cold, and also to take some oral motherwort granules to see the situation.