I'm trying to figure out why my period is so late. It's bothering me because Winter Break is ending, I go back to school tomorrow, and my period is going to catch me by suprise when I'm at school now. It's a week late? I don't understand. I'm not pregnant so that's fine, I just don't know why my period is so late. I'm very stressed out in general, I don't take any birth control or hormone additives, I'm just a relatively healthy woman. Any tips or suggestions?