Sick baby ...... help

My girl is 2 months and 10 days old. She developed a Terrible stuffy nose. I am using the bulb syringe and saline drops with some relief. I have her head elevated in bassinet. Is there anything else I can do? It’s breaking my heart to hear her cough on the mucous. I feel like a failing mom for the first time since she was born. Super scared with Covid - no temps and she is eating and drinking , no wheezing or sob.still in the back of my mind