Chances of being pregnant??

My boyfriend and I had sex a few days ago and only after we were done did we realize the condom broke. I'm not on any kind of BC. I quickly checked my period tracker to see if I was ovulating and it said I had ended ovulation 6 days before our mishap. I took Plan B 12 hrs after... However from my research I am getting mixed answers on the possibility to conceive 1 week after ovulation. On top of all this, I'm supposed to start Saturday... I usually get PMS symptoms like sore breasts but my breasts have been unusually sore this go around. Your thoughts??? Please no judgemental/rude comments. I only want advice from people who actually wanna help a girl out and state their honest thoughts on the situation. Thanks!