Spyralle,
Based on the things you have said about him, you are going to be so much better following the course you have decided you must
take. I want to say all kinds of things, but they've been covered, so I'll just add my support.
With all you've been going through, it's not the worst thing in the world that you cried. What else happened? Are you able to meet with her again and have a "do-over" ?
What do you think she means that you have not supported her for the past week? How does that translate as far as your written job description? I read that you're a nurse. Are you in direct patient care, or in a different capacity? If you're a nurse, I would think your primary responsibility is not to support her, but to manage care for your patients. What does line management mean? Is that another term for an evaluation?
You don't have to answer any of my questions, I just hope you can be gentle with yourself, put this into perspective ( perspective being one of the reasons I asked some of the questions in addition to my interest) , and keep going despite what feels like those sledgehammer blows.
cats paw