I went through the same thing about 6 weeks ago. Not nice!
I had to bust out both the nebulizer and the sinus bottle.
I used albuterol and mucomyst in the nebulizer and colloidal silver in both when I was at my worst. Gobs of tylenol, some sudafed and extra strength mucinex. It seemed to hit the lungs hard after some minor cold symptoms, major fatigue and sometimes chills but no fever, low appetite....
My son had it but he had the runs on top of everything else. It seemed to affect all of us in different ways but we all got sick at Christmas. For all of us, it started with a cough and runny nose.