Hmmm...that's an odd answer, imo.
See this thread and see if the videos sound like any of these:
http://www.yorkietalk.com/forums/die...d-trachea.html
Did you get her the kennel cough/bordatella vaccine? If so, she may have kennel cough as the vaccine can cause it...in which case, some prescriptions would be in order. Also, you may want to catch what she is doing on video so that you can show your vet...or, better yet, a different vet altogether perhaps.