I remember for my first, I kept the secret for 3 whole months. I wanted to surprise my family with the announcement of my first pregnancy at christmas time.
Well about 1 week before my expected period date, I saw my whole family. They all (indepenently) said to me "Something is different, are you pregnant?" EVERYONE!
They kept telling me I was glowing and found that really really strange. Of course I had my doubts that I was pregnant but never had the confirmation. So when I finally told them I was, they were like "I KNEW IT, WE KNEW IT"
I wonder if this has ever happened to anyone.