New babies sneeze a lot. They have sneezing fits. Someone will say, "Is that baby getting sick?" or "Does that baby have allergies?" She is OK. Sneezing is normal in newborn babies.
Think about it. Just a few days ago, she wasn't breathing at all. Now there is air going in and out of her nose all the time. The sneezing will lessen in a few weeks. You don't have to do anything about it.
Thanks to Janelle Aby MD, Stanford School Of Medicine, Newborn Nursery, and Lucille Packard Children's Hospital for the use of occasional photographs.