hi and welcome to HCM,
After reading your symptoms i can say your are suffering from Acute Pharyngitis
which is a bacterial infection or sometimes viral infection seen post flu .
It often shows symptoms of fever
, pain and discomfort in throat ,running nose and cold.
i would suggest you to start with Augmentin
625mg along with analgesics with paracetamol
twice daily for 3 to 5 days, Antihistamine like LEVOCETRIZINE will help in subsiding cold and running nose.
use lukewarm saline water or antiseptic mouthwash for mouth gargling which will give soothing effect.
If the symptoms do not resolve with antibiotics you need to consult an ENT surgeon for clinical evaluation
i hope this helps,