hello and welcome ,
After reading your symptoms i can say your are suffering from Acute Tonsillitis
which is a bacterial infection or sometimes viral infection seen post flu .
It often shows symptoms of fever
, pain and discomfort in throat , white patches on the peritonsillar crypts ,mucus from nose.
i would suggest you to start with Augmentin
625mg along with analgesics with paracetamol
twice daily for 3 to 5 days till the symptoms subside .
use lukewarm saline water or antiseptic mouthwash for mouth gargling which will give soothing effect.
drink lot of water and keep yourself hydrated.
If the symptoms do not resolve with antibiotics you need to consult an ENT surgeon.
i hope this helps,