Matt (the baby) has the SAME thing. A low grade fever and a cough which is worse in the morning. He acts fine. I wasn't sure if I should take him in since the fever is fine with Tylenol and it's really only around 99.5 or 100. But, it's been hanging around for about 2 days now. Odd.
I would call, especially since your pregnant (you really really don't want bronchitis, if that's what he has, and it's super contagious). DH and DD both have had really junky junky coughs for over a week now. They feel fine aside from the horrible sounding cough. DD has been on antibiotics since Friday and a nebulizer 1-3 times a day depending on her wheezing.
At least make a call to see if it's visit or watch worthy.
Spring=fun times for allergies, URI, bronchitis!