dear user these symptom of fever you have refer to having underlying disease caused by bacterial infection or viral infection not detected yet ........you need not to worry as the most common cause is viral infection and so we dont need to be stressed and just follow these simple steps we suggest that there is bacterial infection and antibiotic indicate now you should do some investigations to detect cause.......as widal test for typhoid ,urine culture for possibility of uti ,blood test if any other symptom you feel you should examine that with your doctor as it may help alot and discuss other symptoms that give the way for detection of the cause of fever ........ investigations should be done as blood culture ,urine culture stool culture and wudal test and tuberculin test..........antibiotic is prescribed according to these tests just now you need not to worry if you feel gradual improvement also stress and anxiety can cause these symptoms so try to avoid that wish you healthy life