I was with Guy #1 on July 26th. Then, I got my period on August 1st. I had been with Guy #2 since then, and have a due date of May 15th. Is Guy #2 the father?
Since you got your period after being with the first man, it is more likely that the second man is the father. Based on your last period, your fertility window would have been in August.
Updated on April 3, 2018