I am so sorry to see this sad news *HUG* I know it's easy to lose the faith, but try to think positive and do everything to try to get the word out that she's missing. Here is a link with ideas on finding a lost dog:
http://www.yorkietalk.com/forums/showthread.php?t=49514
I will pray that your sweetie is returned safely to you. There have been a lot of lost yorkie stories with happy endings and I pray this will be also. Don't give up hope! I feel so bad for you and wish I could help in some way. I'll be checking back for updates. *HUG*