['I am so mad at my co-worker today! She had the nerve to tell our boss that I was rude to a patient, which is completely out of my character', 'Oh no, I hate situations like that, when you still have to see people like every day, ugh.', 'Especially a co-worker like her. She is not nice to patients or people and she just wants to get me in trouble because she is always in hot water.']
Don't show your anger at all  or let her know it got to you.
I am so mad at my co-worker today! She had the nerve to tell our boss that I was rude to a patient, which is completely out of my character.