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Well your clinical picture which started with headache, high grade fever, fatigue followed by joint and muscle aches and then occrence of rash, this is suggestive of Dengue fever which is a type of viral fever caused by mosquito bite and has a clinical course similar to what you have been experiencing. So if you have been staying in a densely populated area with lots of mosquitoes around then this probability of dengue fever becomes manifold. Kindly see the link below to know more about the symptoms of dengue fever my so that you can compare your symptoms and relate the two.
The symptoms of dengue fever usually start 4 to 15 days after the mosquito bite and the symptoms may last between 3 to 10 days, although in some cases the dengue fever may become severe and require hospital admission.
As a differential diagnoses, other conditions can also be considered such as leptospirosis, typhoid fever, malaria, Rocky mountain spotted fever, yellow fever, etc, so before going for investigations and diagnosing the condition, you shall check with the locals about which one of these fever is endemic in this region. This shall help in diagnosis.
So below mentioned tests shall help in the diagnosis such as .
CBC with ESR, with metabolic panel and coagulation studies. Specific attention to be given to platelet count as it tends to decline in dengue fever.
A MAC-ELISA ESSAY is usually done to confirm the dengue fever, however other tests like PCR test can also be used for the confirmation.
So kindly discuss these tests and diagnostic possibilities with the doctor and get the necessary investigations done. Meanwhile keep yourself well hydrated with lots of fluid intake. Do not take any medication on your own , specially for fever, in dengue fever only acetaminophen or paracetamol can be taken for fever.
Being a viral fever, it usually subsides on its own, so one has to manage only the symptoms.
I hope this helps.
Wish you Al the best.
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