foul smell in nostrils

I HAVE HAD A FOUL SMELL IN NOSTRILS FOR QUITE SOME MONTHS NOW. IT BEGAN AS AN ODOR OF SMOKE AND THEN SOMETIMES IT WOULD SMELL LIKE MUSTY OLD CARPET....ETC....BUT ALWAYS THE SMOKE WAS  IN THERE. I HAVE NEVER SMOKED AND NO ONE SMOKES IN MY HOUSE OR FAMILY. I REALLY AM NEVER AROUND IT. I HAVE TO CONSTANTLY SMELL LOTIONS, PERFUME, SOMETIMES VICKS UNDER MY NOSE. LATELY I HAVE BEEN FEELING NAUSEOUS.....DON'T FEEL LIKE EATING, MY MOUTH FEELS YUKKY...EVEN AFTER BRUSHING. HEADACKES. HAVEN'T BEEN TREATED BY A DOCTOR YET. BUT IT LITERALLY  SEEMS TO BE MAKING ME ILL. WHAT COULD CAUSE THIS????
I BEGAN USING A NETTY POT TONIGHT....BUT HASN'T HELPED YET.
COULD IT BE MEDS????
COULD IT BE SINUS????
I DON'T FEEL AS THOUGH I HAVE AN INFECTION IN SINUS.
NO RUNNY NOSE, NO CONGESTION>
THANK YOU