First of all, emergency contraception is taken only if you have unprotected sexual intercourse and you don't want to be
pregnant.
Secondly, only time will tell what will happen if you take emergency contraception 2 days before your periods. So you should wait for the next two days.
You may get your periods.
Or your periods may be delayed by 4-5 days.
Or your emergency contraception might have failed and you might conceive.