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Unwanted 72 is a hormonal
pill and is used as an emergency contraception
and you may get period like bleeding with in a week of taking the pill but since you have taken 2 pills in a time of 8 days you may get bleeding with in a week of taking the last pill and if you don't then consult a Gynaecologist for treatment.Unwanted 72 has side effects like nausea;vomiting;irregular menses etc so use it as an emergency pill but if you have sex more than once a month better start on regular contraceptive
pills so that you will be protected from unwanted pregnancy
as well as it will help you maintain your periods regular.