i had sex (unprotected) on the 13th pill in my first pill pack of loseasonique, i missed one pill on the 11th day but took it on the 12th day. My period started may 20th and i began taking the pills during the 4th day of my period as instructed by my dr. i panicked and took plan B as back up protection. i believe i may have been ovulating when the sex happened. what are my chances of pregnancy?