Do i have the west nile virus? i have fever at night, cough, mucus and sore throat and just came back from vacation in arizona.

No way to know: More likely that you may have "desert fever" (coccidiodomycosis), but this is purely speculative. Suggest you see a doctor unless you are better in the next several days. West nile is conceivable, but very unlikely.

Don't know: Most people don’t have sx’s w West Nile virus. Mild sx’s occur in about 20% of people; which can include fever, eye pain, generalized body aches, headaches, feeling really tired, & possible enlarged lymph nodes or rash. About 1% have severe illness which can include neurologic problems. Possible sx’s include: seizures, severe headache w stiffness of the neck, high fever, confusion & weakness.