Is the baby mine?

[Jayymazin]

Me & my ex had sex Oct 2 unprotected & her and another guy had sex Sept 25 unprotected. But she's pregnant. Her due date is 06/18/16 & her period started Sept 12 and ended Sept 17 is baby is mine? If the baby is mine I would love to have a kid because I always wanted a smaller me.

[AnnieBrooke]

It's by far more likely to be the other guy's baby, then.  I'm sorry if this is bad news for you.  If you're excited to have a child, you might start looking to find a woman with whom you think you can be happy for a long time (like, at least the life of a child up to age 25) and "settle down," as they say.  :)  Babies are so much fun that people kind of forget for a moment that they turn into kids, with costs and needs, and then rebellious teens, with even more costs and needs, all the while you are trying to stay together happily with the mom in order to make a safe and secure home.  Lots to do, there.  Good luck to you.

[Pretty_pat]

You need to visit a doctor so the doctor can do some tests to find out.
Congrats and I hope its yours.

[AnnieBrooke]

If you did not have sex with her in September or before October 2, the chances are that the other guy is the dad.  Did she get her due date from an ultrasound or just from a doctor using a little cardboard wheel or a calendar?  If the doc was just computing from the first day of her last period, a lot will depend on how regular her cycles are.  Do you know anything about that?  Are her cycles like clockwork every month or are they somewhat more randomly spaced?

[Jayymazin]

No.. We didn't have any sex before Oct. 2 and yes her first ultrasound EDD was June 18, 2016 and I don't really know anything about it.. But she told me she thinks the egg implanted Oct. 7 because she started spotting.