It is normal to have no bleeding immediately after taking the emergency contraceptive pill. The emergency contraceptive pill contains a lot of estrogen and progesterone, some people will have vaginal bleeding after taking the pill, some people will have withdrawal bleeding, leading to early menstruation, and some people will have delayed menstruation. After taking emergency contraceptive pills, menstruation will return to normal in 1-2 months. After taking emergency contraceptive pills, there will be breast pain, nausea, vomiting and other symptoms similar to early pregnancy reaction, which are normal physiological reactions caused by the large amount of estrogen and progesterone in the pill. Use a pregnancy test to rule out pregnancy. If you are not pregnant, consider that the pill is causing the delayed menstruation.