are there any other symptoms with it. it sounds like it could be as "simple" as the common cold or flu (of course, to us nervous mommies, nothing is ever simple, so to speak). i suggest calling your doctor's office and seeing if s/he reccommends that you bring your baby in. with his medical conditions, sometimes the littlest things can be big.
at 6:14 PM on Jan. 21, 2009