My LMP was on February 4th. I had sex with guy #1 on the 12th, 13th, 14th, and 16th. Then I had sex with guy #2 on the 24th. When did I conceive?
Based on your LMP, your fertility window may have been between February 14-24. While I'd guess that guy #1 is more likely to be the father, I can't rule out guy #2 if for some reason you ovulated late in your cycle.