[Wabbit]

I read this:

Some common signs of Kennel cough are coughing which may sound like choking, discharge from the nose, and a build up of discharge in the corners of the eyes.

If the yorkie is kept indoors you should run a humidifier as well to offer them some relief. Generally it will be gone in about two weeks depending on the overall health of the Yorkie. It is very contagious so if you have other dogs, it's better to quarantine the affected dog.

Kennel cough can turn into pneumonia...

The most common symptoms of pneumonia are coughing, rapid breathing and/or deep, heavy, open-mouthed breathing. Increased respiratory effort can lead to vomiting, a decreased appetite and rapid heart rate.
If a dog has pneumonia, it often will not lie flat, but will rest on its sternum, with head and chest elevated, to aid in breathing. The dog's gums may be pale or bluish in color.
In this case DEFINITELY contact your Vet...I would make sure to give her all the antibiotics she was prescribed....

Even if you just want to be reassured... call your Vet.