Just calm down and relax, everything will come to you in time! It is a very stressful time after you've passed your boards and are suddenly thrown into the workplace, but I guarantee you that it is a rewarding experience. You will continue to learn and become a seasoned professional. Again, relax, take a deep breath, and enjoy. You've wanted this forever!
She is confused but don't let her confusion rub off. They need new nurses really bad and she knows that. She will do all she can to keep you on, so just take a deep breath and move on.
You've been there 19 years with the same head nurse and she still doesn't like you? I would say that it was her problem-not yours! As long as you are doing your best and the patients are getting the best care you can give-forget about her!