E.; she can go to school, she probably is not contagous, she is just plugged up, stop giving her milk products , some milk products can do that, and she can have also small sinuses, and they can plug up, also she may be cutting her molars, my son always had a cold like things when cutting teeth, so many possibilities, colds and stuffy noses usually last for about two weeks, for them to clear up, keep giving her the medicine like the dr mentioned, usually those pills take a while to clear things up, she should be fine, if she is having trouble breathing, and cant breathe take her back to drs, but it should just be sinuses, so hang in there and keep up the good work, of being a mom, if it were the throat, greater concern, but it is the nose, so its probably just the sinuses, so wait it out she should be fine to go to school, it could just be a simple alergy so cut down on milk products my son would not be able to breathe through his nose, when drinking whole milk, i switched to two percent and it worked well, D. s