HI, thanks for using healthcare magic
The cold sensation is due to the chills that can occur along with the fever. The person has the feeling of being cold though their temperature is actually too high.
It is due to a part of the brain trying to reset the body's temperature as a result of the infection.
The shower is a good idea, tepid water should be used not cold because then the body may tremble more and push the temperature up further.
It is possible that she has a viral or bacterial infection of the stomach/intestines which is common.
You can monitor for any additional symptoms such as
vomiting,
diarrhea etc.
The
ibuprofen can be repeated after 6 to 8 hours. You can give paracetamol/
tylenol in the interim if the fever is still high.
If the temperature does not respond or she develops any concerning symptoms then she should see a doctor (pain is severe, loss of appetite, vomiting).
Would need to rule out conditions such as
appendicitis.
I hope this helps