I am sooo sorry this has happened to you. I just keep hoping you will have the same happy ending as Mooney's mom and so many others who have lost thier babies.
I know this is a terrible thing, but offering a reward will make your chances better for getting your baby back. I have a friend who had her boxer stole from her front yard. She went through all the motions: signs, posters in store windows, newspaper ads ets. As soon as she added a reward, she had her girl back that day! It was almost as if Daisy, the boxer, ahd been taken by meanies in hopes of making a little money.
When they called her, the first thing they asked about was the reward amount!
I hope you find your baby! Keep thinking positive and doing all your doing. I hope you filed a police report. We later found out the people who retruned Daisy, had been so lucky to have 'found' lost dogs before.