COULD IT BE HIS???? HELP?

Natalie
My LMP was 10/6/2016 I had sex with my boyfriend everyday after my period ended so we broke up again around October 16th my ovulation is October 20th... well I had a one night stand with an old ex boyfriend on October 23rd by accident please don't judge me I'm 3 days late for my period took a pregnancy text came back navigate two test did the confused part is who's the baby father my ex boyfriend or boyfriend??