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It does sound like she is having great discomfort,though to diagnose something like that she would need a hands on exam. The fact that she is not eating or actively drinking, is vomiting, panting and shaking would warrant a vet visit today.
Panting and shaking are signs of pain, if there is problems with breathing or seemingly painful breathing that alone would warrant a vet visit.
Vomiting is a generalized illness, that may not be so concerning, but you are also stating that there seems to be a problem with breathing, which could mean that when she vomited something could have aspirated into her lungs. If it were my dog I would have Emma seen today.
Below is a chart on what is normal in dogs, including gum color, capillary refill, temp, heart rate etc. to help you to decide if you should seek help today as it is a decision only you can make.