Rehaired the bow, and now I'm terrified of it

Took the bow in for new hair on Thursday, first time in two years. It came back gleaming, almost arrogant. The sound is brilliant and sharp, but my right arm doesn't trust it yet — like wearing somebody else's shoes that happen to fit. I keep playing the same Bach sarabande over and over, waiting for the bow to feel like mine again. Maybe it's not the bow that needs breaking in.