Aaron has been rubbing his nose on things for several months- but lately he does it a lot. Like when I'm putting him to sleep, he's always wiping his nose back and forth on my cheek or shirt (and making little snorty noises!). And when he's nursing lately, he'll take his hand and either lay it on his nose or kind of rub his nose with it. Could this be allergies? Or I thought it might be teething? Do I analyze my son too much?!