Who is the father?

The first day of my last period was May 30. I had unprotected sex with Guy A on June 5th, 2 days after my period ended. Then I had unprotected sex on June 16th with Guy B. I dont know how long my cycles are to know exactly when I ovulated. I got a positive pregnancy test on June 28th. Is it possible to know exactly... show more The first day of my last period was May 30. I had unprotected sex with Guy A on June 5th, 2 days after my period ended. Then I had unprotected sex on June 16th with Guy B. I dont know how long my cycles are to know exactly when I ovulated. I got a positive pregnancy test on June 28th.
Is it possible to know exactly who the father is just by using these dates?
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