I usually suffer from allergies which cause me to sneeze a lot, clogged ears, congestion etc. Lately, I had a very bad cold with excessive mucus. It lasted for more than two weeks. After taking Claratin D which helps a lot with decongestion, the cold cleared but I was left with a nasty odor in my nostrils which only I can smell. The smell is between sweet, pungent and moldy. Sometimes it smells like rotten fruits. Today is the 6th day. The smell wave comes like every 40 minutes. Please help.