as there is 1% failure rate of unwanted 72, you better do urine pregnancy
if that is positive you may be having miscarriage
in case of negative test you may be having regular menstruation
as some abnormalities like periods occurring early or late, abnormal vaginal bleeding
are noted with unwanted 72 that may be reason for your symptoms.
after taking test you visit local gynecologist, she will guide you depending on the result of test.