That's what my doc told me... which was too funny because he meant that my cold was all in my head (as in sinuses, nose, throat) and not in my lungs... but for a second I was like....
"Hey! I'm not imagining this!"
Then I got what he was saying - he also offered to write me a note saying that I MUST miss another day of work... but I figured best not to take advantage... besides with the killer antibiotic he prescribed me I should be feeling better by morning anyway!
Coolest doc ever!