Eventually! She went through a very traumatic experience, so if she just bounced back immediately it wouldn't seem real. I can understand her being upset with Callie, but I also feel bad for Callie because she was just trying to save Arizona! :(
I am very hopeful that Arizona will be back to her bright and cheerful self. She showed a glimpse of hope in the past episode. I think they wanted to portray how trauma can affect someone so greatly and how they can work through the life-changing event.