Momma tried to warn us about boys

So my last period was may 8th which makes me late according to the <a href="https://play.google.com/store/apps/details?id=com.glow.android">ovulation tracker</a> I had sex during high ovulation times with my ex. I now have this amazing man in my life and the last few days I've been super tired and my boobs have been sore. What are the chances I'm pregnant with my exes baby add not my bf