If you take the emergency contraceptive pill and have bleeding twice a month, it is not necessarily that you have two periods a month. It may be abnormal bleeding caused by the emergency contraceptive pill, or it may be a normal period at the same time. If the amount and duration of bleeding is the same as the original amount and days of menstruation, it is possible that you are actually having a period and you can rule out the possibility of pregnancy. If the bleeding is less on both occasions and is completely different from the amount and days of menstruation, it may be a side effect of the pill and cannot completely rule out an unwanted pregnancy or even the possibility of ectopic pregnancy. If you have abnormal bleeding after taking the pill and have intercourse for more than 12 days, you must use a test paper or pregnancy test or come directly to the hospital to have a blood test for HCG to rule out an unwanted pregnancy.