About two days ago, I began smelling smoke, as if someone were smoking cigarettes or burning wood, even though neither is happening near me.
Yesterday I felt a sore throat coming on, and today I have all that plus a fever. Still have the smoke smell.
I found this web page about the phenomenon, and it appears I'm not the only one to experience it. Barring a rare brain tumor, all signs point to sinus infection.
I hate smoke.