Worried...?

This is day six of my period and for well over a year my period has only gone for at absolute max of 5days. And my period was about a week late which is also unusual. It's usually only about 3days late at max. I'm worried something might be wrong with me? Till I got my period I thought I might be pregnant because I was getting multiple pregnancy symptoms for weeks now. Any ideas what's going on? Should I be worried?