Our 6 month old son has a lot of mucous draining. When he sleeps he gargles in it. He has vomited clear mucous several times today. We have seen 2 pediatricians for this now over a three month period. We are using a cool mist humidifier and saline drops. He got better for the last two weeks but the last 5 days have been worse than ever. He eats and gains weight, after that no one seems concerned but us. He doesn t sleep. Suggestions?