Hi. I'm 17 years old and my period is a couple of days late. It usually occurs between the 28-32 day cycle but it surpassed it by 2 days and that's never happened to me before. I got my period before last month with a day late and now it's two. I know I'm not pregnant because I haven't had sex. What could be the problem?

At your age it could be nothing more than a fluxuation of hormones.