hello thanks for your question most of the time, there is no reason to worry if you bleed after taking emergency contraceptive pills Although not a common side effect, the hormones in the pills (either progestin alone or progestin combined with estrogen) can cause some women to bleed at unexpected times. If that is the cause of your bleeding, it is not dangerous and you should expect it to go away by itself after you get your next period. You should know, however, that your unusual bleeding could be caused by something else that, in rare cases, may be more serious. It’s a good idea to call your health care provider if you have other symptoms (like abdominal pain or dizziness), if the bleeding lasts more than a few days, if it starts to get heavier, or if you re just worried that it might be something serious. After taking emergency contraceptive pills, your next period should come within the next month, either on time or a week before or after you would normally expect it. if it doesn’t come within a week after you expect it, you might consider getting a pregnancy test. I think these information will beneficial for you thanking you