What Causes Sore Throat, Swollen Glands, Headache And Fever?

Hi, I had my tonsils out 2 years ago but I still suffer from the exact same symptoms as before just without the swollen tonsils. Still get feverish, very tired, very sore throat, headache and swollen glands. I also had adenovirus in my right eye last year. Why do I still suffer from these symptoms?? Thank you Vicky