So, my last period started on the 15th of last month. I'm not sure how many days my cycle usually lasts but, I had sex on the 5th. We used a condom but I'm not on any other form of birth control. Normally I wouldn't be freaking out, but I haven't been intimate in a long time. At this point I think my period is about 5 days late. Am I just making it late by stressing? What shoukd I do?