My infant's nose has a honking sound when she inhales. Is this congestion and do I need to use a nasal aspirator?

Probably. However i don't know enough to say for sure. Like is this new. And if it is new, an aspirator could be tried but safely.
Swollen nasal mucosa. try a cool mist humidifier and saline nose drops.too much use of an aspirator can cause more swelling but 1-2 times a day if you are getting secretions is fine.