Baby on the way?

Last month I was still pushing myself to loose those extra baby pounds I gained from having Audrey. We had a play date at Jenn B's house on May 31st. Jenn's the playgroup founder, she's expecting TWINS!! Totally excited for her! I was all into trying to figure out how twins come about, is there a secret way of creating them...or a certain time of the day...or magical foods you must eat! Turns out, its runs in her family. Its in my family too, but it doesn't happen often. My great grandmother was a twin, they actually had two sets of twins in their family, one set of boys and one set of girls. Well after talking to Jenn about her pregnancy, I notice I was feeling a bit odd myself. So instead of trying out the ovulation kits she gave me, I went to Walmart and got a pregnancy kit. Sunday morning, June 3rd, I did the test, positive! Well, those things can have errors, so I went to the doctor's office and did the test, results were the same. Made an appointment, which was this past Wednesday June 20th. Totally excited and confirmed. I saw the ultrasound image and heard the heartbeat. This is soooo awesome! Only problem is I don't know when the baby was created! I've been breasting feeding Audrey up to May 8th. The menses are never accurate when nursing, so I never kept a record of them. I know it didn't come in May...but when did it come in April? I think the baby was conceived on April 15 or 16, the ultrasound shows the baby being 9 weeks and 2 days as of June 20th! So there we have it, baby was conceived on April 16th! That is just toooooo cool! Baby was created on Daddy's birthday! If that is correct, estimated due date would be January 8th, 2008.