My husband has flu like symptoms every two to three weeks. Fever, sore back, cold hands and feet, achy all over. The fever is highest during the night. Night sweats accompany the fever. These symptoms go away for a couple weeks and then return. This has been going on for a few months. There was a trace of blood in his urine. A scan showed no kidney stones . They treated him for a kidney or urinary tract infection with a round of antibiotics, but the symptoms are back.