It started as minor congestion and a sore throat on Saturday. My doc has Robitussin and Tylenol products on the OK list for colds, so I took some yesterday but I saw today that the active ingredients are class C so I stopped. It's full nasal congestion now and just starting to cough phlegm. I am using a netipot which helps for like 15 minutes, and good old Tylenol is helping with the general hit by a bus feeling, but I'm worried about it turning into an infection or the phlegm worsening. Any recommendations?