Vomited 10 times and the vet said you can wait until morning?? If she is dehydrated, you could lose her by morning.   
Her gums she be pink and wet (not tacky). If they are not, it is a sign of an emergency. And when a Yorkie throws up 10 times, it is usually an emergency anyway.    
You can give water, but she probably won't be able to keep it down. And you can give Pedialyte, but if it is pancreatitis, that could seriously injure her. Call the ER and see what they want you to do...     
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