In this case, you can continue to wait and see if your period comes on schedule. If it does not come when it is supposed to, you should highly suspect that the contraception has failed. You can go to the pharmacy and buy a pregnancy test to rule out the possibility of pregnancy. If you are not pregnant, you may have a delayed period after taking the emergency contraceptive pill. Not all people will experience withdrawal bleeding after taking the emergency contraceptive pill. As the endometrium suddenly loses hormonal support, it will shed and bleed, so the absence of withdrawal bleeding does not mean that the contraception has not been successful, only that you can continue to wait further.