Welcome to Yorkie Talk. If you can, try to catch the episodes on video for your vet to see.
There are a number of possible explanations. Watch these videos to see if any of these problems are what your little girl is experiencing:
http://www.yorkietalk.com/forums/die...d-trachea.html
Wylie's Mom, Ann, one of the moderators here, one of her little boys, Marcel, got something stuck up his nose and had symptoms similar to what you are describing. Any chance she got something up her nose? You can read Ann's thread here:
http://www.yorkietalk.com/forums/sic...-question.html