You seem to be suffering from viral fever
and it takes around three to five days to become completely all right.
As far as your symptom of swollen esophagus
is concerned,it seems to be due to esophagitis
and gastritis caused by paracetamol
,and specially if you tend to consume it on empty stomach.
Treatment lies in taking some proton pump
inhibitor like PANTOPROZOLE 40 mg daily in morning on empty stomach.
Take paracetamol for fever and take it after eating something.
In case your fever extends beyond 5 days,you must visit your doctor for examination and necessary investigations,to rule out various types of infections like typhoid,malaria etc.