So I was with 2 different guys and am unsure who's the father of my newborn son. My due date was August 1st 2011 although I had him on July 25th 2011. Was pregnant for 9 months and 3 weeks. Last period estimated late October. (25th?) help? :)

You may have to resort to a DNA test and not go by any exact date. You know when you slept with these guys. Get the DNA test and be sure. You will have a lot of heartache and resentment ahead for you and your son if you don't. Also, it will make it easier for you to file for child support or for the guy to marry you (if he wants to) then he would know for sure this is his son without anything hanging in the wings to strip him emotionally of his son if he is not the father. Some men can't handle that - not knowing for sure. Don't put your 2 guys through this kind of emotional rolleroaster.

Sorry if the time of sex was close together, there is no way to estimate or guess. Within a couple to a few weeks apart is just guessing normally.

A DNA test will be the only real way to know