K.P.
Humidifier and suction... I'm not sure what you mean by "won't let you". In this case, hold her down and suction her nose! It will help her sleep, eat and drink. My son HATES it, but if we don't suction his nose when he gets a cold, he develops an ear infection (per the doctor).
Not a reason for a doctor visit, unless she has a fever. She's too young for OTC meds, so really all you can do is humidify, suction and yes elevate her pillow. We also use the baby saline spray to get all of the boogies out!