Hello Madam
Welcome to HCM
I advice you not to take this medicines by yourself without the supervision of doctor. They have their own side effects.
After emergency
contraception, usually you will have bleeding on the same date of your period may be +/ - 2 to 3 days. They are nearly 80 to 84 % effective.
I advice you wait for another 4 to 5 days and if your period will not start, i advice you for urine
pregnancy test, using the kit which is available in most of the drug store.
Depending on the result you can take the suitable step.
Hope i have provided the information you needed.
Take care.