Don't give up hope just yet!!!
She has not been gone very long!!! Odds are that she is very close by!!! Maybe one of your neighbors took her in??? Jen is right!! Get flyers out!!! Get the word out!! Make calls! when you can, but Be out in the Public!!! If Someone has her... And someone sees her who knows your dog is missing... your more likely to get her back!!!!! offer a reward!!! Rewards, sad to say, bring people out of the woodwork! Rally the whole neighborhood!!! Offer all of the neighborhood kids a reward if they find her!!! Kids will do anything for a buck, and kids are NOSEY!!! They can find almost anything... even in other peoples back yards!
Good luck girl... I'll be praying for ya!!!