I had this problem, and then relized I'd burned a hole in my septum...the congested feeling I had was due to a flesh/snot scab that would form inside the hole periodically. It would feel like I was breathing through a straw when breathing through my nose, but I was congested in the typical sense--no buggers, snot, iinflamation, etc... As soon as I blew out the scab, it was like my nose opened up again. Not saying this is ur problem, but if u snort a lot its worth thinking about--either as a cause, or as a thing to avoid. I believe I got it from falling asleep with coke in my nose for about a year straight, had been snorting for a while b4 w/out issue but practiced good nasal hygene--saline spray, neti pot, etc