I just recently got over a very severe cold/flu. I am 59 years old in pretty good health. After I started feeling better, all of a sudden I started smelling ammonia in my nose. It s nowhere else, just in my nose. Sometimes it seems as though the smell gets in my throat and eyes. It is more ignoring then anything. My sense of smell is very low, because unless I put something right up to my nose, all I smell is ammonia. What can I do? Should I be worried? How long will this last? Thank you.