M.V.
My 4 month old daughter was the same way it lasted about a whole month before it went away. I would do the vicks humidafiyer, little noses saline drops and congestion medicine. They really dont do much. Evevtually hers went away slowly. Also if its to cold in the room it wont help the baby get better. Vicks on the chest and feet with socks over them really help too. Hope the baby gets better.