Sounds like a cold to me. But if you want to take him to the dr's, I say take him.

Re the cough though, everytime DD gets a runny nose, the next day (or couple of days later) she develops a really nasty sounding cough. We always get it checked out and we are always told that it's just from her snotty nose, making it's way down the back of her throat. That could be whats happening to your DS.