I had my normal period November 10-15. I had sex Thursday, Friday, and Saturday morning of that same week. On Saturday, about mid day, I started bleeding again and have been bleeding ever since. It s not constant and it was only heavy the first few days. I ll stop, maybe a day or two or a few hours, but then start again. I haven t had any other complications other than normal cramping. This week is the week for my next period and I start my new pack of birth control pills this coming Sunday. Could this be a serious issue?