Thank you for your question.
I am Dr. Su S. and I will try my best to help you.
Viral infection usually takes 3-5 days to recover.
Supportive management like rest, plenty of fluid usually help.
OTC Advil or Tylenol cold can help to reduce the symptoms.
Soup, light tea, gatorade, water, fruit juice can be good.
You can wait 1-2 days more.
If the symptoms continue, I would advise to consult doctor to have an examination.
Doctor can take a few tests to know the precise cause and make a management plan.
I hope this information will be helpful.
If you have any query, please feel free to ask.
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Wish her healthy life.