Is this his baby?

[MoniqueShan]

My due date is May 18th. I had sex with an ex between July 22-29?

[MoniqueShan]

Okay thank you so much! Because I had cheated on my bf that one time with my ex and then u ended up pregnant. I told my bf about what I had done but at the time I told him because I was angry I didn't think nothing about it not being his baby. But we are still going to get an DNA test to be sure. I'm still worried kind of but I feel a little bit better now that you've added it up for me.

[AnnieBrooke]

Here is what the conception calculator says for a due date of May 18:

     Probable date of ovulation:  August 25
     Possible dates of conception:  August 21 to 29

Unless your due date was from a method that is not very reliable, such as manually counting forward on a calendar from the first day of your last period, it does not sound like the ex has anything to do with it.  On the other hand, if your cycles are really irregular, and if you didn't get your due date from an early ultrasound but by a less reliable method like the calendar, there is a slim chance.  Just note that the May 18 due date suggests conception was a whole month later than July 22 - 29.