My first day of my last period was April 2, 2016. I was supposed to get my period on May 5,2016. The app on my phone said that I could get pregnant between the dates of April 18-23. On the 20th I had unprotected sex with a guy and he ejaculated inside me. I bought and took the Plan B pill the very next morning. That was less that 24 hours. Well I had sex with the 2nd guy on the 22nd and he also ejaculated inside of me numerous times then and throughout the next week. Is there any chance at all that this could be the 1st guys baby?