My 9 month has been congested for 2 months. Some days it is really bad. I don't know if this is a food allergy or if it is allergies/cold. My 4 year old started preschool in September and he has been pretty congested too, but he also has allergies. He definately has brought home a few colds too. Should I worry or start an elimination diet? I don't do dairy/soy, wheat and eggs already. I use saline spray and humidifyer at night. What do you think?