I'm glad to hear it is just a cold but like you said..WEIRD!!! Hubby and I went out for a small bite to eat last night at our local diner and 2 of the waitresses told us both they and their kids are going through the same thing.
It just seems the post nasal drip won't end or the tiredness and cough. I guess all you can do is the same old thing, keep him warm and hydrated. I don't know if you use a humidifier or not, but those are suppose to help too. I had one for years but recently had to get rid of it..it was old and not working properly. I did notice there was a difference when I had it, so might get another.
Thanks for updating me and I sure hope he feels much better soon....JJ..