If the endometrium is 11 mm thick and there is no menstruation, it is advisable to rule out the possibility of pregnancy and to use the morning urine to test for early pregnancy. If the blood HCG is negative, you can take progesterone orally to induce menstruation, take two capsules once a day for 3 days, and most of them will come in 3-7 days after stopping. In most cases, menstruation will occur within 3-7 days after stopping the medication. If you still do not have your period on the 8th day after stopping the medication, it is advisable to take another test using morning urine, as it may be clinically caused by pregnancy.