I'm a 25 yr old male in good health, last sunday night I started having really bad aches and running a mild fever, 100.0, I went to sleep that night and woke up with the chills and shakes with a fever of 103.8, I keep alternating tylenol and ibuprofen to try and break it, the next day all day long it was at 101.0, and then later on in the evening it got to 104.0, I had the chills and shakes real bad and started to sweat for about an hour and it came down to 99.0, went to bed and woke up in the middle of the night again, sweating REALLY BAD, I was soaking wet from sweat, and I checked my temp bc I felt good after I woke up from sweating and it was at 98.0, so i thought it was over, went back to sleep and woke up in the morning with a fever of 102.7, and its been between 101 and 102.8 all day. Does this sound like the flu? Why does it keep coming back after I sweat and break it? How long does this last? Can I alternate Ibuprofen and tylenol every 4 hours without damaging my kidneys, liver, or heart? I dont know how else to keep the fever down. It seems to get worse in the evenings, and REALLY bad at night time. Please help