HELP! Please Read, Question on Paternity

So, my boyfriend and I broke up and two weeks later I was with another man. November 12th 2011, the following week my boyfriend and I got back together and we slept together November 18th 2011. On November 29th I found out I was pregnant. My last period from what I remember, and they are not regular was October 28th 2011. Is my pregnancy leading towards the other man being the father or my boyfriend being the father. I also just had my 12 week ultraound done and the measurements for gestational age said 11 weeks gestational but my doctor still says that I am 13 weeks pregnant this week. I am unsure, and want some advice and help. yes, I already know the sure way is through a paternity test but I just want some advice.

[confusedmommy523]

I also forgot to say that with the other guy he didn't use a condom, we only had sex for 20 minutes and he said he didnt come. With my boyfriend we had sex for 2-3 hours and the condom fell off, I'm not sure for how long, but it fell off and then we stopped and put a new one on and kept going.

[RockRose]

This would be easier if you just typed the due date your doctor gave you into this website,  and it will tell you the window when you got pregnant.  

Without a due date,  we all here  have to pull out a calendar and count forward and then enter this.

Here you go.  You just type in the due date the doctor gave you and it gives you your answer:

[RockRose]

Oops,  meant to post the link:

http://www.****.com/conception-calculator

[confusedmommy523]

My due date is August 7th 2012. My Doctor says however I am 13 weeks pregnant but when reading the report from my ultrasound they say I measure at 11 weeks and that I am 12 weeks give or take a week. If you use that due date it says I likely conceived on November 15th, 2011. If that is the case then somehow, pre sprem stayed alive inside me for 3 whole days and then got me pregnant which I find hard to believe but I suppose it is possible. I know that the male didn't ejaculate when we engaged on the 12th of November. Also, that calculator is a guideline, every other site I have used has left me with the answer of I probably conceived between November 11th - November 19th 2011, which makes it possible again, that either men are the father of the child. I guess I just won't ever have an answer until I get paternity. *Sigh*

[mum2beagain]

Sperm can live in a womans body for up to seven days given the right conditions and a man does not have to ejaculate for him to release sperm into your body; pre ejaculate can contain enough sperm to get you pregnant. As you sexual relations with the two men were so close together unfortunately you are right and the only way to know who this baby belongs to is to get a paternity test after it is born.

[RockRose]

I agree with Mum2Be.  It's VERY likely the sperm lived 3 days - that's completely normal.  As she says,  7 days is kind of the limit,  but 3 days is typical.  

And I agree,  I don't think you'll have an answer until you do a paternity test.