It is possible to get pregnant after taking the pill and having sex again because the emergency contraceptive pill only has a contraceptive effect on the previous sex, but not on the next sex, so it is possible to get pregnant after taking the pill. If you are not planning to get pregnant, you need to take the emergency contraceptive pill again to prevent pregnancy. The emergency contraceptive pill should only be used as a remedy after sex, not as a regular form of birth control. Frequent use of the emergency contraceptive pill within a short period of time may cause menstrual disorders. Moreover, the emergency contraceptive pill should not be taken more than 3 times in a year. Vaginal bleeding will occur within 7-10 days after taking the pill, which indicates the success of contraception, and this bleeding is equivalent to a menstrual flow. If you do not have a period after taking the pill and your period is delayed, you should go to the hospital to check if you are pregnant.