Suggest Treatment For Swollen Lymph Nodes And Fever

I am a 42 yr old male. For weeks my neck has been hurting! My glands are swollen, I have a low grade fever, it hurts to turn my neck and touch it. It hurts to talk & eat. The pain keeps me up @ night & its hard to go to work & function! I have been to several docs & haven't received an answer! What's wrong?