Welcome to HCM,
You have severe sore throat
along with fever,and prostration,it may be viral in origin and secondary bacterial infection is possible.
Please consult good ENT Surgeon and after examination and if required investigation,you will require suitable antibiotic,analgesic
,anti inflammatory, and decongestant medicines and it will take some time to recover.
please keep yourself well hydrated and take paracetamol
in the mean time.
Hot saline and hexidine gargle will help to some extent.
Please do not take anti biotic by yourself as it may not be effective and may cause unwanted effects,as such also self medication
is not good.