My LMP was April 7. Had unprotected sex with guy A on April 19 but be pulled out. Had unprotected sex with guy B on May 6 where he came inside me twice. Was due to start my cycle on May 7/8. Recently tested positive on pregnancy test. More than likely guy A or could there be a chance it is guy B?

Either one... no way to tell until the baby is born and you do a DNA test.