What Are The Chances Of Getting Pregnant After Taking The Morning-after Pill Following Unprotected Sex Just Before My Ovulation Window?

Hi I finished my period on the 29th of December and had sex on the 31st of December .When my boyfriend pulled out and ejaculated outside we noticed that the condom broke. I took Escapelle morning after pill in an hour and according to my ovulation tracker my ovulation starts on the 7th of January, whilst my next period is on the 21st of January. What are the odds of me nothing getting pregnant if he ejaculated outside and I took the morning after pill? Thanks.