What are the odds?

So, please no judgement on my part. A friend of mine and I reconnected after a couple of years, And it turned into a romantic night with unprotected sex. Later on I checked on here that it was the day before my ovulation window was to open. What is the likeliness that I would become pregnant? My body has been feeling really weird, but I don't know if that's just me catching a bug that's going around, or early signs of pregnancy. It's still a little too early to take a test, I just want some personal thoughts, really. Please be kind.