Need advice

Ok so my ovulation window was for the 2-8. My boyfriend and I have had sex the 3,4,5,7.. it said high chance of getting pregnant on the 6 but we didn't have sex that day.. and the 7th was my ovulation day.. what's the chances of me getting pregnant during my ovulation days.. I'm a mother of three my oldest is 8 middle child is 4 and youngest is 2. None of my pregnancy was planned but we been trying to conceiving for a few months now.. any answers would help thanks