So, my period is late by four days according to <a href="https://play.google.com/store/apps/details?id=com.glow.android.eve">Eve</a>. In the past, it has started a little earlier than when <a href="https://play.google.com/store/apps/details?id=com.glow.android.eve">Eve</a> says, and it is usually done by this time of the month. I know I'm not pregnant, and I can't think of a reasonable explanation as to why it's late. It's starting to worry me, and my boyfriend suggested going to the clinic on campus if it doesn't start soon. I know that my worrying can very likely make it even later, but I can't help it. Anyone have any advice on what to do??