Unprotected sex, worried about pregnancy

Patient: I am 18 years old and had unprotected sex yesterday, i.e., 3rd october’14 around 12:30 pm, my last period cycle was around 21st september’2014 after 11 hours i took i-pill but i am worried too as my ovulation date is near so please tell me that, is there any chances of getting pregnant ? please reply.

Symptoms: Pregnancy