You need to take her temperature. Here's a great how to:
How to Take Your Dog?s Temperature
Toy breed dogs can dehydrate quickly, often in as little as 24 hours. Dehydration throws their electrolytes off and is very serious as they can go into cardiac arrest. Syringe feed her Pedialite to keep her hydrated.
If she continues to vomit, I'd try to find an ER vet today. I know it's a hassle and they are expensive, but waiting another day could mean hospitalization on an IV.