Hi Welcome to HEALTHCARE MAGIC..
I have gone through your query and can understand your concern...
Vaginal bleeding after intake of an
emergency contraceptive pill such as unwanted 72 is not cause for concern. The bleeding she had 9 days after unprotected sex on 18th must be
breakthrough bleeding. This bleeding is a normal feature of intake of unwanted 72 & occurs within 2-3 weeks of pill intake. This means that intake of unwanted 72 was successful in preventing
pregnancy.
The bleeding she had again after 13 days of first bleeding must be her periods. This bleeding would last 3-7 days as a normal menstrual perioid. You should not worry as she is definately not pregnant after getting a menstual period
An emergency contraceptive should not be used as regular method of
contraception. It is intended as for emergency purposes like accidents, unplanned sex, etc. Emergency contraceptive pill could cause irregular & delayed periods & other harmful effects including
infertility. Next time use regular contraceptive pill or condoms for prevention of unwanted pregnancy.
Don't worry you would be fine
Hope this information helps