That is unusual to have vomiting followed by hard stools. Usually it vomiting followed by diarrhea.
She does not sound very ill right now which is good.
The thin hard stools indicates some constipation issue. Either she was a little dehydrated and there is not enough moisture in the stool formation.
Or she needs a little more fiber in her diet to help her stool bulk up, form, and move through.
Or she is having a problem with the normal flora in her colon. There are always good bacteria, and bad bacteria, in the intestines. Sometimes the bad bacteria take over and they cause constipation, gas, or diarrhea. You can try putting some probiotics on her food. Probiotics help put the good bacteria back into the intestines. Fortiflora, by purina, is a good one. You can buy it online or at petsmart. You sprinkle it on the food.
Try to increase her fluid intake. You can mix warm water, or low sodium broth, with her food. If she likes broth, you can offer that plain as well.
To increase fiber, you can put human Metamucil on her food. 1/2 teaspoon, per 10 pounds of dog, twice a day.
You can try everything at once or one thing at a time.
Her stools should be back to normal in 48 hours.
It takes 48 hours for what she eats to come out.
I hope this helps.
If you have additional questions, please reply.