I think it is a plain old fashioned head cold. I had to be at work today and there were four or five of us with similar symptoms. We stood at the edge of the reception, avoiding spreading our germs, commiserating over our bad luck. But others have had it and I guess it's our turn.
I'm using a neti pot and keeping the gargle with warm water handy. Mucinex to clobber the congestion and cough (but only barely the cough).
I'll sleep on the recliner tonight - and the big question is - which dog will get to sleep nearby, and will she try to crawl up onto my lap when I'm not looking?