If you have not had your period for 2 months, you can test for pregnancy with an early pregnancy test or take a blood test for HCG if your period is usually regular, or you can do an ultrasound to see if you are pregnant. If the early pregnancy test is positive, or if the blood HCG value is elevated, or if a gestational sac is seen in the uterine cavity during ultrasound examination, it means that you are pregnant, which is normal. If the test is not pregnant, it may be caused by endocrine disorder, which can be treated with hormone therapy, such as taking progesterone to make menstruation come. If you are under too much stress or stay up late, you can take progesterone under the guidance of your doctor to regulate your period. If you use oral contraceptives, you should take them correctly according to the instructions, otherwise they can also cause menstrual disorders. If you do not intend to have children, you can use intrauterine device for contraception, which is a safe and reliable method.