If you take the pill without bleeding, it does not mean that the contraception is not successful. Generally, if you take the emergency contraceptive pill within 48 hours or 72 hours after sex, the contraceptive success rate will be above 99%. Whether or not you bleed after taking the pill varies from person to person, and there is no relationship between the success of contraception and whether or not you bleed after taking the pill. If you are not bleeding after taking the pill and are worried about pregnancy, you can test with an early pregnancy test ten days after sex, and as long as the test is not pregnant, then the pill is effective and the contraception is successful. Do not take the pill more than three times a year, even if your body is strong, you should usually pay more attention to reduce the impact of the pill on your physique.