If you usually have regular periods, come normally every month, delay your period for more than 6 days, usually have normal sex, and have no contraception, the first thing to consider is whether you are pregnant. At this time, the easiest way is to go to the pharmacy and buy early pregnancy test paper and test it by yourself with your morning urine, if the test paper shows two bars, it means you are pregnant. After confirming pregnancy, you should go to the hospital for an ultrasound to see if the pregnancy is intrauterine or ectopic, because an ectopic pregnancy cannot continue and must be treated in hospital. If you don’t get pregnant with a pregnancy test, the first thing to consider is irregular menstruation. The main cause of irregular menstruation is endocrine disorder. If you have recently been under a lot of pressure at work or in life, have changed your work or living environment, have irregular work and rest, or eat spicy or stimulating food, all of these may lead to endocrine disruption, which may cause irregular menstruation.