My period comes around every 28 to 30 days. Well this month I was suppose to start around Feb 3 or 5th but instead I started on the 12th. So I stopped bleeding four days later and had unprotected sex on the 17th. The next 3 days I bleed again lightly but the last 4 days have been like a normal heavy period... My normal period never last more than 5 days and this is the second one of the month and it's been 7 days long... What is going on.... Please help