A wet cough can be a sign of pneumonia so I would consult your pediatrician immediately if your child has this. If they have a fever, the chances are even higher there will be big problem.
With a fever THAT high we call a doctor, and the doctor will tell us if the child needs to get seen ASAP.
If not I give Tylenol & Popsicles witch helped so far.
We use breath again, RC and peppermint essential oils by applying them to our children's chests.