unprotected sex and ovulation next day

I know this is so crazy so refrain from commenting if you are going to tell me to take better precautions, but I know the chances are high but what are the chances of pregnancy if I had unprotected sex last night (he pulled out but I’m sure it was precum) and I just started ovulating today. I have been tracking my cycle and expected it to not be for a couple of days but yea.