D.D.
first thing i thought too was 2 year molars..i have a 2 year old and last month we had some trouble w/ sleeping...i think it was the 2 year molars..also he was getting a cold..can you cover one nostril at a time and see how she's breathing? if one or both sides are plugged up then she could be having trouble breathing from a cold..my son has a light cold right now so i use Xlear..it's a natural nose spray you can get it at Whole Foods..i have to use it before he naps or we won't get a nap these days.