Need to vent!

I'm sorry if this annoys people, but I have to vent because I'm so frustrated. And it's a long post...There is a nurse who is new to my telemetry unit(but not a new nurse). She has been there since February and is getting more and more abrasive. She is really just rude. Yesterday morning I gave reprt to her on several patients. When I came back last night I found out that one patient "fired" her. He said she was rude and wouldn't bring pain meds when he requested them. I had another patient who was a DNI. When giving report back to me last night, I asked if the patient was alert and oriented and she said, "She is a DNI and I don't care about that" I was astounded. I stated I at least like to have a baseline. During the day the patient became a DNR, I was not told of this, pretty important info! I found the DNR on the patient's chart so it was not a problem, but it could have been. During the night the patient's bp bottomed out. I put the patient in Trendelenberg twice, and successfully reversed the hypotension. The patient also desatted and took quite a bit of work to get her back to normal. When I informed the nurse of all that I did this morning she said, "I don't understand. Why are you doing all this, putting her in Trendelenberg and stuff?" I said, "well I couldn't give her fluids and I wanted to get her bp back up" and she said, "She is a DNR. She is here to die. Why would you do all that?" I was so shocked. She is not a palliative bed. She may be going home with hospice, but she is not a hospice patient yet. But she is not a do not treat. The more I think about it the more upset I get. I will most definitely be meeting with my nurse manager in the morning. Am I right about going to management? This is only one example, I have had other patient care issues but this one is the biggest. Thanks!