Rupture of the hymen
usually causes only a small amount of bleeding in the count of a few milliliters only and should stop within a few minutes assuming you do not have any bleeding problem. If the bleeding however occurs from other causes then it might continue as long as the incriminating blood vessel is sealed off. In any event you should check your dates to correlate if the bleeding is due to your period. In the event that the dates do not match you should visit a gynecologist to exclude any serious form of injury
which can cause persistent bleeding and needs intervention.