I am 5 days late on.my period and haven't showed any signs of starting please help?

Missed period: Cycles can sometimes be irregular, so that your period does not come as expected. This can happen with severe weight loss, stress, extreme exercise, etc. Pregnancy is another possible cause for a missed period. If you've had unprotected sex, pregnancy is possible. In a couple of days you cold check a home pregnancy test or see your physician for one.