Some advice/help...two potential fathers. So confused!

[HarleyQuinn4]

I'm currently around 21.5 weeks pregnant and I'm having a girl.

My LMP was Dec 23rd, but my periods were extremely irregular at times that I'd be late two whole weeks. Based on my LMP, my due date should be Sept 29th which is nowhere near the due dates my doctor has gotten from my ultrasounds. And I know for a fact I didn't conceive during the time any calculators I've used to determine a conception date based on my LMP since I didn't have sex during this time.

I had sex with guy 1 on Jan 9/10 (past midnight), unprotected. I then had sex with guy 2 on Jan 14/15 (past midnight) with a condom. He swears it didn't break. I had sex with guy 2, again (this time unprotected), on Jan 17/18.

The very first ultrasound I got I measured 5 weeks and 2 days. The doctor gave me an initial due date of Oct 4th. Since it wasn't that far off the 29th, they said they wouldn't change it. Then at my 12 week ultrasound, from the measurements, they got a due date of October 2nd. I recently got my 20 week anatomical ultrasound to measure all parts of the baby and the doctor came back with the results of an October 7th due date.

So now I'm so confused and kind of freaking out as to who the actual father is. I told guy 2 he could be the potential father. He is aware of guy 1 since I initially thought guy 1 was indeed for a fact the father. But now I'm not so sure. And my doctor said he wouldn't change my due date from Sept 29th since is was only an eight day difference.

What are the chances of guy 2 being the father!? Please, any advice or info would greatly be appreciated.

[HarleyQuinn4]

I'm just happy that my daughter is healthy and she'll be born into a loving family (which include three siblings) regardless. Thanks again for your help!

[HarleyQuinn4]

I have a feeling it's the first guy's child. But regardless, I still plan to do this all on my own if by some miracle it's the second guy's.

[AnnieBrooke]

As I said, ultrasounds are less accurate for dating purposes as a pregnancy progresses.  The early ones are the ones for dating a pregnancy.  When the baby is born, get a DNA test, so you will never have to wonder (and will never have false hope either).  I'm sorry if guy #1 is a jerk and guy #2 is nice, because everything of significance for dating the pregnancy points to guy #1.

[HarleyQuinn4]

Thanks for the input. Do you think it'd still be a good idea to get the DNA test done just in case? Guy1 isn't in the picture at all, and Guy2 said he's willing to do the test if it's necessary. When I found out the gender of my baby at 16 weeks (a girl), they also gave me a due date of 10/7. That's why it's a littler nerve racking...

[AnnieBrooke]

It sounds most likely, from the first ultrasound you had, like you conceived around January 11.  The second suggests January 9.  Neither of them strongly suggests the second guy, they are both before he came along.  Don't use anything from the ultrasound at 20 weeks to try to determine a conception date.  They are less and less accurate for dating purposes as a pregnancy progresses.