persistent odd smell

I went to my doctor and described my problem. I have been getting what I feel is sinus pressure and there is a constant smell in my nose that others do not smell.Sometimes my nostrils seem blocked, but I do not have a "runny" nose. An MRI of my sinus was clear. My doctor prescribed Nasonex, but I have been hesitant to begin treatment, because it seems it is for a runny nose. Also I have been reading the side effects. Has anyone had similar symptoms that have been helped by using Nasonesx? Thank you.