Thanks for your query.
as mrntioned by you she has swallowed coin 3 weeks ago,so by now it must be out,it has nothing to do with these symptoms.The fever
is suggesting respiratory infection and is mostly viral in origin.I suggest you to give her paracetamol
if fever is 100F,give her plenty of fluids,warm water will be good,you can also give steam inhalation.
In case symptoms get aggravated take her to pediatrician'
Your daughter will be fine