Hi, I had a caught a cold virus that lasted for four weeks now (I have never been sick this long). For the last two weeks, I have had a dry, stuffy left nostril , with no mucus/drainage. My right nostril I can breathe from just fine. I do not know what is wrong with my left nostril. Could it be pressure? I do not feel any pain or swelling on any parts of my face, though. Please help!