I have had the flu since 11-3 when I went to an Infectious Disease Doctor for my husband. First symptoms: total body sweats (gown soaked), heat from mouth to stomach like a burning espohagus (heat not indigestion, very weird), no fever, temp actually running low. Sick enough to fear going to hospital for exposure to H1N1 on top of what I already have. Had reg. flu shot 2 1/2 weeks before exposure. Two nights ago I had a terrible headache...felt like my brain was onfire...that is gone after 1 night. Have talked to 2 APN's and my inurance's HEALTH LINE NURSE...no suggestions. I have Type II Diabetes...checking blood sugar, no problems...A1C is 5.3. What can cause the heat without fever? My temp is actually running 98 to 97?