Who is the father?

I know you all read stories like this all the time. And I'm not even going to bother to ask to not be judged because I myself am judging my own self. However I would like to state first that both men are fully aware of the situation at hand and are ready to step up. And that I made a big mistake and am now paying the price. I also know that only a DNA test can give accurate results. I am simply looking for opinions. Thank you in advance for your feedback.

With that being said my last period was on April 24, 2018. On May 4th I had unprotected sex with A and he pulled out. On May 6th I had unprotected sex with B, he pulled out. And on May 9th I had unprotected sex with B again and he DID NOT pull out. My estimated ovulation dates were may 4th-9th. But my period is irregular. I found out that I was pregnant on May 21st. Prior to that I had taken a test on May 15th that came out negative.

Which guy is MOST LIKELY the baby's father?

Thanks again.

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