I Had Unwanted 72 After Half An Hour Of Unprotected

I had unwanted 72 after half an hour of unprotected sex. My periods are due on 15th of August. What are my chances if getting pregnant? How much delay can the pill cause? I have stomach pain too and I was guessing it's because of something bad I ate today. Can it be because of the pill I took yesterday afternoon or is it really food poisoning?