Just to make sure the plan B is good to work

So me and this guy had unprotected sex together. Ik 🤦🏾‍♀️ just one thing led to another and both of us forgot condoms existed. But he ended up cumming inside of me on my fertile day. I was ovulating the day before. So that was at like 7pm. It wasn’t till the next day at like 10am we made it imperative that I take plan B. So my question is, is there a chance the plan b might not work bc I was fertile and we waited over 12 hours. Also I’m a plus sized girl, and I know the research isn’t conclusive but heard it doesn’t work as well on overweight women. Plus my women in my family are so fertile. So quick to get preggers 🤷🏾‍♀️lol