Odds of birth control working


Ok so I’m new to having sex and I know my sex Ed probably wasn’t the best. I’ve been trying to figure things out though.

What are the odds of getting pregnant if we used a condom and I ended up taking emergency contraceptive a few days later? I know the back of the box said within 3 days of sex but I wasn’t able to get it until a little over 4 days. Online says it can actually work up to 5 days so I’m just wondering what you all know.

I also wasn’t ovulating when we had sex but I’m due to start ovulating in the next couple days.