Hello Doctor, I have had several bouts of this for the past several years. This year it has happened twice and it s only June. My family doctor treated me for the flu, but I don t think it s the flu. My symptoms are fever, chills, weakness, loss of appitite, unable to sleep, night sweats, coughing, and general misery for periods of three to five days. I get a flu shot every year since I m 70 years of age.