OK so I guess I got pregnant around July 17th well I had sex the last day of my period wich is at the beginningg of the month with my x boyfriend don't remember the dates of my period just know its at the beginning of the month then I had sex with my boyfriend on the 18th or so I was just wondering who the father might be?:confused:

Most likely it is who you had sex with on the 18th. Ovulation occurs approximately 14 days after the first day of your period and that is when you are fertile.

There is no sure way to tell though, until you get the paternity test.

As J9 said... most women tend to ovulate mid-cycle... so I would lean to say your boyfriend is the father... but honestly there is no way to be 100% positive without a DNA test.

Am in the same page