Brief Answer:
could be due to an impending infection, rest yourself, observe how you stay afterward...

Detailed Answer:
Hello and welcome to 'Ask A Doctor' service...
I've gone through your query in details...

First and foremost stay indoor, and drink plenty of warm liquids (soups, broths, porridge, bournvita, etc.)...avoid going to any overcrowded places for the time being...preferably, take rest for a few days until fully recovered...

Along with it, do regular warm salt water gargling three times a day for the next 2-3 days...along with it, also do Betadine gargling twice daily in an alternate fashion for the next 2-3 days...take some steam inhalation twice daily...

No cold drinks/cold beverages (avoid curd/cold milk beverages for the time being)...drink plenty of lukewarm water throughout the day to keep yourself well hydrated...

You may continue taking Paracetamol up to three times daily after some food...

With all these, it should regress over a period of time... However, if you notice any persistence of fever, worsening of present symptoms then you should not delay any longer and get yourself checked up by an Internal medicine specialist...further investigations as well as antibiotics therapy may need to be initiated in that case after evaluation...

Let me know if I can assist you further...
Wish you good health...

Take Care
Kind Regards

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Brief Answer:
most welcome...

Detailed Answer:

Get well soon...

Take Care
Kind Regards

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