Unwanted Pregnancy issues

Patient: I had unprotected sex with my fiance on Sunday Sep 13, 2015.She is worried if she is pregnant or not.She has not taken emergency contraceptive pills.Her last period started on Aug 17, 2015 and her cycle is of 30-31 days.Her period is not started yet.She is not having any early signs of pregnancy.She is very very tensed.Please respond the chances of pregnancy and if any whether it will be safe to take abortion pills without letting anyone know.

Symptoms: None