I'm pregnant and don't remember my last period but know the exact date I was sexually active can I still calculate my due date?

[x3kels]

I don't remember my last period, I'm horrible at keeping track! Guilty. I found out I am pregnant on July 4th, 2014. I want to know exactly how far along I am and my due date. I again don't remember my last period dates but I do know the night I was sexually active. I've tried the calculators on different websites but they all go off my last period and my estimations could be way off! Is there anyway I can figure out how far along I am and my due date based only on the night I had sex? This is my first pregnancy and I have an obgyn appointment next week but would love to know ASAP! Going another week is killing my patience! lol
Any help is appreciated! :)

You can use that date as the conception date. The 12 week scan will then give you a date going by the measurements of the baby.

I managed to get pregnant before getting my periods back when I had Dd2. I knew the conception date so had a rough idea for the due date. Scan dated me a couple of days later than I thought. And that date became the official date.

Congrats!

Yes. Just assume your last period started exactly two weeks before the date you think you conceived.

Thanks a ton! :) I was so confused, haha. I convieved June 21st so my due date should be March 14th, 2015! :)

Congratulations!

Congratulations!

I know the exact date I conceived this LO, and wish id also known DDs. Helps to know my edd is pretty much as accurate as it can ever be.

Yes assume you conceived on day 14. Day 1 is the first day of your period. So sex minus 14 days will do it!

To be fair no one knows exactly when they conceived it is just assumed day 14 for everyone I think