My sister is 18 years old. She is having viral fever from 29th july. We had visited the doctor and he had given her antibiotics and some other medicines. Her body temp was near 103F for first 3 days. And now it is in between 100-102. Everyday morning she is waking up with [no fever/less temp (around 99F)]. The fever is increasing at night. The same day (29th) morning her menstruation had started. She was bleeding little less this month. Today her menstruation ended. This lasted 4 days (normally it lasts 5-6 days). She was quite good today. Her temo was normal throughout the day. But again it has raised (101-102F). She is taking all the medicines that the doctor told. Tomorrow the medicine course will complete. What type of fever is this. We are unable to understand. If someone can guide us that will be helpful.