Hi, I ve had a cold for the past week or so - started with sore throat , then congestion in my head mostly, a bit in my chest. After resting all weekend I went to work today feeling better, but around 3 in the afternoon I blew my nose , again..., and immediately smelled this foul smell. Then I touched my face beside my nose and it s a bit sore and tender- the sinus , that is. Question - what can this smell be?