perplexed

She was nonplussed , but quickly collected herself, explained that the plumbing had been acting up for days, and told them to pay it no mind.

— Diane Ackerman Cedric looked nonplussed . He looked from Bagman to Harry and back again as though sure he must have misheard what Bagman had said. — J. K. Rowling

unsure about what to say, think, or do