My 4yr old had fever, chills, vomiting. The fever went away now her throat hurts and she had blisters. What can I give her?

Motrin or Tylenol (acetaminophen) Sounds like it may be herpangina. Most often caused by the hand, foot and mouth virus. Tylenol (acetaminophen) and Motrin can be used for pain. In severe cases with multiple sores dehydration can become a problem. Avoid acidic foods and juices for a few days as this may be irritating to the open sores at the back of the throat. If the abdominal pain, vomiting and fever persist see your pediatrician.
See below. It sounds like she may have hand, foot and mouth disease. I would give her tylenol (acetaminophen) or Motrin for pain relief, and plenty of fluids and rest.