I have a cold

From last Tuesday I have had a serious cold, high fever, cough, headache, muscle pain. And it is lasting...
Is it influenza?
I just know some words, how to describe them in sentence?? Say if I'm looking for doctor.

Hello there :) Here's my correction for your entry:

I have had (or I've been having) a serious cold, high fever, cough, headache and muscle pain since last Tuesday.  It doesn't seem to be going away.  Is it influenza?  I just know some words and I can't use them in a sentence. Please let me know if I need to see a doctor.