I want to shout it from the rooftops!!!

Daniela
I want to tell everyone so badly that I'm pregnant!!! But I'm only 5 weeks and haven't even had my first prenatal visit!!  I've told my mom and sister, and of course my fiancé but man, oh man! I am so excited to announce it to everyone else!
I went to the bookstore today to pick up some reading material and it felt SOOO good when the teller asked if I was expecting based on my purchase and I proudly said Yes!! 
How long did you all wait to tell extended family and friends?!!