My Girlfriend And I Had Sex With A Condom. When

My girlfriend and I had sex with a condom. When I pulled out, I forgot to check the condom and to make sure it didn't break we got Plan B. She took it within 6 hours of this incident. The very next morning (less than 12 hours after she took Plan B), we were stupid and had unprotected sex. We went for another pill and she took it within one hour. We are worried because she was during her ovulation period. What are the chances of the Pill(s) working?