Bruce, I hope the ENT can help you, and I also hope you can fight the feared oncoming cold. I, too, fear an oncoming cold. Have had a number of bouts with congestion since my bronchitis episode last October. Got a major head cold that moved into my chest the week before Christmas, and it has never completely gone away.
I take Mucinex, liquid and tablet, which sets me aright most of the time.
I used to take Nyquil as a sure-fire tonic to make me feel better. However, it also gave me nightmares. Rather, its effect on me led to nightmares. I found them much more disturbing than my symptoms and have abandoned it for other medications.