Who’s is it?

Hello all, I feel kind of lonely right now I’m pregnant I got a nipp (non invasive dna test done) I get the results back in a few days. Please no judgment. I had sex with my ex on the 14th of September but my period was on it was ending it ended the 16th. Then I had sex on the 25th with (we can call him Dean) and now im pregnant ever since I told Dean im not sure who’s it is between the two my app says my ovulation week was with Dean it says I ovulated the 28th and I just don’t know