Yes we're having twins!! We found out at our 19 week sono (April 19th). I almost fell off the table when they told me.
First the tech said, "This is the baby on the bottom left... we'll name this 'A'." I thought she was just talking about where the baby was, and naming the picture "A" arbitrarily. She let us know the baby was a boy.
Then the words I will never forget: "Ok, now let's look at the other baby."
Umm, what?! I just looked at her and said, "You're joking."
She said, "No I'm not, there's two babies in there... I wasn't sure if you knew or not."
By this time it was pretty obvious that I didn't know as I was breathing faster, my heart was racing, and I kept repeating "Are you serious?"
She showed us "Baby B" (At this point I realized why she had named that first picture "A") She let us know he was a boy too!
I was completely shocked!! Alan was there when we found out; he was taking a video of the whole thing. He didn't change expressions as we found out, he told me later he was in "filming mode" It definitely hit him later though :)
On the way home from the ultrasound, I kept thinking about having two carseats in the backseat instead of one. For some reason, this made the news seem real... and it seemed like such a huge responsibility to take care of these two little people. This got me a little overwhelmed and teary. It is a huge responsibility, but hopefully we will be up to the challenge :)