If a woman takes progesterone privately without checking the blood HCG to rule out pregnancy before taking progesterone, and she does not have a period for 18 days after stopping progesterone, she should first go to the gynecology department of the hospital and have her blood HCG retested to determine if she is pregnant. You should also have an ultrasound to check the thickness of the endometrium. If you are pregnant, you will not have your period because progesterone has a therapeutic effect on the fetus. However, if the endometrial hyperplasia is not obvious due to the short duration of progesterone, it is necessary to consider taking supplemental Glaxo again to replenish the estrogen in the body to stimulate the endometrial hyperplasia. The menstrual flow is possible only after stopping the supplementation.