Firstly, taking the emergency pill twice in a single cycle is bound to cause bleeding disturbances as it contains high level of hormones. If you have regular 28-30 day cycles, you took the pills during your safe period which was probably not needed. You may need to exclude any urinary infection also. If you do not get any period until two weeks after your due date, see your health care provider for further support. Please remember, emergency pill should not be used as a regular method of contraception
and should be used only a couple of times at most in a year. Use a regular method of contraception as suggested by your doctor. Good luck.