I m drinking lots of fluids and usually urinate four to five times a day. Lately, I am drinking the same amount of fluids, and have been urinating only twice a day. I have headaches and experienced what I thought was the flu in the last two weeks (chest congestion and burning, difficulty breathing, low-grade fever, coughing, fatigue) but I m getting over that. Is not urinating a byproduct of the flu? My lips are chapped like I m dehydrated but I am drinking about 96 oz of water a day.