Hi. This is all suggestive of an actual swelling in the throat. I would advise you to consult an ENT Surgeon to undergo urgent Endoscopy to find out the actual reason. It can be die to enlarged tonsils, a mass in the hypopharynx or anywhere in the pharyngeal region. If required a CT scan is also needed. Also go for : Blood- CBC, liver, kidney function, blood sugar. Throat swab from the infected area fir gram staining and culture and sensitivity. Blood culture helps a lot. The treatment is : Get admitted as you need intra-venous antibiotics and supportive medicines Intra-venous fluids to tackle dehydration. Observation and needed procedures to be done.