I do think in some high stress professions that people treat newcomers with a sort of boot camp mentality and bark at you like a drill seargent to "toughen you up."

This is how I've handled it. Everyone is different. I went to a higher up and rather than "reporting a bully" I asked them advice on how to handle or grow through thiss difficult situation. I turned them into a mentor rather than someone I was tattling to.

Example: Nurse B has a tendency to yell at me and belittle me. When this happens I feel like I'm failing in my job or doing something wrong. I need some constructive criticism. How would you handle this?

They may say "meh, this is always how it is in the trenches for a newbie" or "you're doing fine, just ignore her" or even "well as matter of fact you could improve in "x" area."

Whatever the outcome is at least you reached out for help.

As the others said you may need to confront her directly. Do it in private, request a brief meeting with her. Bring a note pad. Ask her how she thinks you should improve and tell her how you feel when she rides you like that. If she says something like you don't do your work fast enough. Ask her for specific examples of how you can work faster. Write it down. Try to stick to the facts.

If she does in fact have a personal problem with you it will become clear in this meeting. You have your notebook to document this.