Hello,
The fever that you are having and the rash seem to be related to viral infection and the rash is a viral rash.Apply calamine lotion and take some Acetaminophen for the fever.The viral rash should subside with the infection but if it persists then a dermatologist’s examination is desirable.
Hope it helps.Take care and pls do keep me posted on how you are doing or if you have any additional queries. Kind regards.