Are ultrasound conception dates accurate?

[tina6146]

I discovered I was pregnant unexpectedly, and went to have an ultrasound on May 23rd. Due to having wavering periods, I never really keep track, and therefore I don't know when my last period was. I can give an "estimate" but I really don't know because I never keep track. (Plus I have always been told that because of metabolic issues, and PCOS that it would be very hard for me to get pregnant).
Anyway, not exactly proud of this, but I was with 2 different men in a two week time period. One I didn't use protection with on Saturday April 7th (we have been very good friends for years, and it just happened on a night out drinking/dancing) and the other man I only went out with a few times, and when we slept together the following week (on Saturday April 14th), the condom broke. I didn't think anything of it, because I am almost 38, and this has never happened to me before.
So, my question is, when I went to have my ultrasound, the sonographer did 2 measurements for the conception date: one was 6 weeks and 3 days, and the other one (just to be sure) was 6 weeks 5 days. So, we split the difference and said 6 weeks 4 days. This would make my conception date April 7th, which is the exact night I was with the first man.
Do you think there's a big chance that the 2nd man could potentially be the father? I am hoping the first man is indeed the father, because we have been friends for years, and it would be alot easier to handle. The second man, however, I don't even speak to anymore. I would hate for it to be the second man.
Any advice on people that have gone through this? I guess I just want some confirmation that these ultrasound dates are accurate. The ultrasound tech was amazing, and I feel like she really knew what she was doing, but I just want to make sure that these results couldn't be a whole 7-8 days off.

[AnnieBrooke]

I would guess from your story that the third ultrasound done four days ago listed May 29 in error.

[duchessaliston]

Hi annie, pls i need your help for a better understanding of when my baby would be born. am 28weeks 1day pregnant. according to my LMP which  was 5th sep 2014,my due date would be june 12 2015. i had sex with my husband on 19th sep 2014. I had my 1st ultrasound around 3mths and due date was 2nd june 2015. had the 2nd ultrasound around 6mths and dues date was 4th sep 2015, the 3rd ultrasound was done four days ago giving due date as 29th may 2015. That was yesterday and nothing happened. am just confussed on when i should really expect my baby. should i stick to the 2nd june as two of my ultrasounds came with same due dates?

[paulmahalona]

alright sorry about that. i havent really used any forum or stuff like this ever

[AnnieBrooke]

Hi, Paul, I think it is not unlikely for this to be your baby.  If you would like to copy your post and start a new question with it (in other words, click "ask a question") it would be less confusing to answer, as right now on this thread is Patty with a back-and-forth conversation that you have popped up in the middle of.  I will get back to you in any case.  MedHelp's system will notify you of any answers to you, but only if you start your own question -- as it stands now, the original poster who started this thread 600+ comments ago gets the notification.

[AnnieBrooke]

I'd do another ultrasound between the 30th of May and about the 4th or 5th of June.

[PattySuarez]

Thanks Annie, I just ¨felt¨ I was ovulating but I know it doesnt say too much. I used to take my temperature daily but this month I just stopped doing it because it was stressing and anyway, things were so bad with my partner that the last thing I wanted was to search for a pregnancy. I did took once my temperature on 23cd (after wetting, being with guy A) and it was high as my luteal phase would be (according to my past 19 charts). I know it was only one day and of course I couldnt see any pattern, but I was at the time confident that I had ovulated. (big mistake?)

Can you tell me how long I should wait for the next ultrasound? I am now in 40cd.

Thank you so much for your time and help, my doctor has not been to helpful. She didnt give any importance to my terrible doubt. She only said: ¨well, you have to take care of yourself and the baby, who's the dad is not important now¨. But for me is terribly important. If my ex is the dad, I don't plan to continue with this pregnancy.

THanks!