Hi there and welcome. Agree with above that the emergency 'morning after' pill is a major jolt of hormones to your system. It messes up your period. It is different for every woman for when they get back to normal. Could be next cycle, could be in 6 cycles. So, be prepared ---- and USE protection each and every time because once a cycle is messed up, it is hard to predict when you will ovulate. good luck dear
Those pills can screw up your cycle and make your period late. As long as you didn't have unprotected sex earlier in the month you should expect your period soon.