Hello and welcome to HCM,
Excessive production of saliva with pain in the throat indicates you are suffering from oral mucositis
or acute pharyngitis
, it is inflammation of the mucous membrane
lining the oral cavity which also leads to formation to oral ulcers. It often leads to pain in the throat, difficulty in swallowing , exacessive salivation.
Inflammtion and ulceration leads to excessive salivation
i suggest you to start consult a ENT surgeon for clinical evaluation and treatment. Mean time you can start with augmentin 625mg along with NSAIDs which will give relief in bacterial soft tissue infections.mouth gargling with chlorhexidine
mouthwash gives relief from throat pain . take care.