The following are some of the reasons why you should not take progesterone for 15 days to get your period:1. You may be pregnant.2. You may also have a thin uterine lining, and even if you take progesterone, you can’t make the uterine lining peel off.3. If you don’t have your period, it may be due to a pituitary tumor, hyperthyroidism and other endocrine disorders, and this may lead to amenorrhea.4. After an abortion, the functional layer of the uterine lining is destroyed or the uterine cavity has severe adhesions. After abortion, the destruction of the functional layer of the endometrium or serious adhesions in the uterine cavity can also lead to amenorrhea. 5, women with anorexia nervosa, mental stress and other endocrine disorders can also lead to amenorrhea. Women need to go to the hospital in time to do gynecological ultrasound, sex hormone examination to exclude the cause of the disease, and then give the best treatment.