im so stressed about this!

[mommy2be146]

Hello,
I am 24 weeks pregnant with my son. And what I am about to ask is something that I wish would have never happened, I had sex with a guy December 15, 2012, just one time and he pulled out. I then got back with my boyfriend December 23, 2012 and we had sex from then on out. I found out I was pregnant January 28, 2013. And started to freak out, because of the guy I had slept with before. My first ultrasound was February 19th, 2013 and I was told that I was 7 weeks and 2 days, and my due date is October 6th, 2013. Should I stop worrying about this other guy being the father of my child? Because me and him do no talk at all, and im still with my boyfriend today, and he is so excited to be having a little boy.

[AnnieBrooke]

It sounds like you must have had a period after you slept with the guy on December 15th, right?  

Here's what the conception calculator gives, based on your due date of October 6.  With an ultrasound that early, it will usually be spot on or only one day off.  

(Assumed) first day of last menstrual period:  December 30, 2012
Probable date of ovulation:  January 13, 2013
Possible dates of conception:  January 9 to 17, 2013

Due date:  October 6, 2013 (40 weeks)

In short, both because of the period that is assumed to have come after you had sex with guy A, and because your ultrasound was early enough to be reliable, the guy on the 15th is well out of range.

[mommy2be146]

I don't remember if I had my period at the end of December :/
but anyways; I should just stop worrying about guy A?

[AnnieBrooke]

Stop worrying about guy A.  :)

[mommy2be146]

thank you so much :)

[AnnieBrooke]

And incidentally, good for you for getting an early ultrasound.  You did everything just right for best certainty.

[kalbert]

Hi I'm going through the exact same thing but I'm 16 weeks had sex with guy A March 15th my ultrasound said i was 9 weeks 6 days due date December 3 so it's only a couple weeks I'm so scared how accurate is an ultrasound at 9 weeks?

[AnnieBrooke]

An ultrasound is pretty accurate at 9 weeks, maybe off by a few days at the very most, more likely just off by a day or two.  Here is what a calculator gives:

Probable date of ovulation:  March 12
Possible dates of conception:  March 8 to 16

Due date:  December 3 (40 weeks)