Are you able to use an asperator (Bulb syringe) so suck some of the snot out? I know a stuffy nose is scarey my daughter started with that when she was a couple weeks old doctor said fine, went back a few days later they tested she had rsv, a couple days later she was put in the hospital, she never had a fever. She is fine now but it is scarey when they are so little. I would call your doctor again or maybe wait until tomorrow then take her to the doctor. Try to elevate her head some to help. Depending what she sleeps in you can prop up the bottom of her bed or put some towels under the matress to help raise it up. In the steamy shower it would not hurt your baby but it might the machine. Watch her breathing if it looks rapid or she is retracting (sucking her belly up under her ribs) then go to the ER because she is having trouble breathing. Babies tend to get stuff as their air ways are small and get blocked easy. So there is a big chance it is nothing but I understand your fear. Because of what happened with my daughter when my son was 2 weeks old I brought him in for a cold and had a major melt down in the doctors office because just having a baby, a 2 year old, a husband who was busy at work, and flashbacks to our baby being admitted into the hospital it over whelmed me. It is okay to be scared and worried. Better safe then sorry.