Me and my fiance, we had a sexual intercourse previously, and on its next day she started bleeding and it bleed for more than 2 days. On first day she had very heavy flow, which she doesn't have normally during her periods(such heavy flow) and on second day flow was light and on third day bleeding was very less. She also had periods in this month and again bleeding occured. Means she had periods twice in this month. Is it normal or a matter of concern for us?