What are the chances of pregnancy .she takes ipill within 4 hours of intercourse. Nd she had withdrawal bleeding. Nd two negative test after 10 and 15 days of intercourse. Withdrawal has came before one day of her due date of periods. Nd it remains upto 3 days. Bt now suddenly she spotting little bit blood. Frm 5th may to 6 th may. Now it stops. So is this due to pregnancy. Or is she is pregnant.