Worry about roommate

Mom is in a nursing home. She is probably stage 4 vascular dementia. Her memory isn’t too bad and she remembers family, but her logic and reasoning are not good and anosognosia is so bad. Her current roommate is very nice. She has health issues, but not dementia. They get along well and it has been good for mom. Her roommate had to be taken to the hospital yesterday and mom is very worried about her. Of course staff can’t give out medical information, so mom has no way of knowing what is happening. The facility does have some residents (probably with dementia) with erratic behaviors and hallucinations. Mom doesn’t understand why “someone would act like that” and is uncomfortable around them. So she is also afraid of who she might get for a roommate if she doesn’t come back. It’s kind of strange, because she shows me no empathy. I twisted my ankle on one of her moves and she laughed and thought it was funny. I never tell her any of my troubles. I don’t want to experience a lack of sympathy and I don’t want her to worry too much. Im not to a point that I feel like I need to talk with her doctor about increasing anxiety medication yet. I was just wondering if anyone else has had their lo emotional and upset about the health of a roommate.