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Hello. Thanks for the question.
It sounds like something upset her stomach and that caused the nausea. I don't think it's too serious at this time. I would try some symptomatic care for now. If the signs don't resolve, then I would potentially get her seen to run some diagnostics and treat more aggressively.
At home, you can give over the counter Pepcid (Famotidine). The dose in dogs is 0.25 mg per lb body weight every 12-24 hours, as needed. I would also give her 6-8 hours with no food or water from the last episode of vomiting. After that time, you can give some water and a bland diet (chicken/ rice) for a day or two before getting back on her normal food.
I hope this helps, let me know if you have any other questions.
Another thing that may help faster is some liquid Maalox or Mylanta. You could give 1/2 teaspoon orally and see if that helps settle her down. If she keeps trying to vomit, then I would get her in for injectable meds and to make sure it's nothing too serious.