i am constantly having to clear my throat, and not just a mild clearing of the throat like most people it's a violent clearing like something is stuck in my throat. i have that feeling constantly. also as of late i'm feeling short of breath and a slight tightening of the chest. i'm having to take deep breaths every so often to feel like i'm getting enough oxygen. my doctor has given me mucinex thinking it was excess mucus but it didn't help. any ideas would be great.