Help mamas! I need it!

Im currently 20, soon to be 21 and starting nursing school in January 2020. My baby boy is 9.5 months old and got pregnant with him on the pill.

So im in a new situation now...On Cycle Day 20 our condom broke, very bad. Cycle Day 21 I decided to do an ovulation test for the hell of it. I thought I wouldve ovulated around cycle day 14-17. Anyway the ovulation test was as positive as it could get. I took plan b on CD 22 in the morning. Well today (CD23) I read that it only delays ovulation if you didnt get your lh surge. Well....I did. What are my chances of pregnancy? Has anyone experienced this? Any mamas out there with two kiddos close in age and in school?

Thanks for taking the time to help me out! Please be honest, no sugar coating.