plan b during ovulation

me and my boyfriend had sex during my ovulation cycle. I had a 15% chance and we did use a condom however it broke. I felt it broke and then he took it out right then. he did not bust inside of me but I was worried about precum so I took a plan b. I’m 17 and this is not something I can handle. If this is the case I will not have an abortion. should I be worried? please help and pray!