I try to be so cheerful and patient with her. but it's hard sometimes. Her mood is usually neutral to good, but the repetitive questions, especially about her bowels just wear me down. I never get mad. I just explain things in a matter-of-fact way, knowing she'll ask again in 5 minutes. I think I'm just tired today : /
I know you are right and I only see her 3-4x a week. I have so much admiration for people who do this all day every day! I vented a little to my husband and daughter and that helped.
I'd be careful to get help so you can take breaks, vacation, etc. I honestly don't know how people are able to hold up long term without help. It has to be too stressful on your mind.