Oh @MoonGal
I have tears reading your post. You are struggling at the moment and I wish there was something I could do. I do understand how difficult it is for you when visiting your mum. I struggle when visiting my MIL in aged care with dementia. Some times she is 'with us' and talking and other times she is 'talking to the wall' and thinks it's all real. It is so sad.
It is so emotionally draining peeling off the layers, I get that too.
Hang in there @MoonGal you are worth it, you deserve a happy and healthy life.
take care xxoo