Thanks for choosing health care magic for posting your query.
I have gone through your question in detail and I can understand what you are going through.
The most common possible cause could be an onset of viral infection. This may cause the vague symptoms that you have stated. Take plenty of water and rest. Keep measuring the temperatures and look out for fever
. If fever appears then you may need to take paracetamol
. If the same situation persists beyond 4 days then you should get a CBC done.
Hope I am able to answer your concerns.
If you have any further query, I would be glad to help you.
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Wish you good health,
Dr. Srikanth Reddy M.D.