In fact, dreams and reality are opposite!
You don't have to worry at all. Dreaming of my father's death is actually telling myself that he is still alive and well, so don't worry.
In fact, I personally think that the reason why you have such a dream is because you are anxious, stressed, emotionally unstable and overly nervous recently. As for the scene in the hospital, as long as what you saw in the hospital a week ago when your father had a cholecystectomy, it was all caused by various stimuli left in your brain or external stimuli. Have a good rest when you are free, relax yourself properly, feel refreshed and get enough sleep. I believe you will never dream like this again, and you will never worry about such things again.
I hope I can help you!