I have read your query.
The natural history of your symptoms puts it more into the category of viral exanthematous fever
The treatment of this would be mostly symptomatic and adequate rest. Anti-histamines like Cetrizine
, topical astringents like Calamine
lotion on the affected areas will help.
Drink plenty of water and fresh fruit juices.
You may consider getting a routine blood investigation done.
Get well soon.