So. I had sex in January. The guy and I were very cautious. He didn't "you know" anywhere near me. And because i am who i am, I decided to be extra cautious so i took the pill "Plan B" the day after having sex. Then in February my period came on time and lasted its usual days. And now its March and I'm so far a week late, I'm not sure why my period hasn't came this month because it was here last month and I haven't had sex since January. I'm thinking my period might not be here because of stress. Because since i moved back home with my parents. The last few weeks have been hectic with them ever since my dad got me a car. What other reason could it be that my period hasn't came? Im thinking its stress, but when would I expect my period to be here now? So sorry I'm asking all these questions im just not too sure bout all of this. So if you can help thanks it would be greatly appreciated.