Janice.........most of us have gone thru exactly what you're talking about. Nine years ago, when Mom was first diagnosed...my frustration, exasperation, mad feelings....and yes, even compassionate feelings ruled my every thought.
I read everything I could find...talked to the kind people at the Alzhiemer's Foundation...and realized that as hard as this was for ME...it was much more difficult for MOM! In the beginning of this disease, most afflicted are somewhat aware of the changes going on...and they are scared...REALLY scared. It takes a ton of compassion and understanding for family members to accept what is happening. NONE of this is anyone's fault.
You're getting some great advice here....especially the suggestion of "time for yourself." I sure do wish I'd found this wonderful caring/sharing place much earlier! Listening shoulders of those who absolutely understand your frustrations does lighten the load just a little.
Hang in there...each phase has different tendancies...unfortunately, you'll learn them easily. Sending positive feelings your way.............Pam