I care for Mom she is in Mid stage and it getting awful for me I really try

Mom is 89 in Mid stage she can dress herself seems clean, feed herself I bring all her food, had turn off her stove it was gas. Example If something new happens she cant remember at all I have to repeat or leave a note, the other day she opened a window couldn't get it closed so I helped her the window slamed on my hands went to ER it was Ok, she forgot the whole siduation. She lives alone I come every AM and if she needs me for anything.  I have a caregiver 2 time a week, for a little break for me. She is only there for 3 hours total for the  2 days.  Mom  loses everything cause she put things in different places all the time.  Took her to Breakfast her pants where on backwards but I thought who cares.  She asbolutely cant manage pills she on aracept(sp?) it helped a little Dr is starting Namenda next.  She has a ton of Quirks, she wont wear her safe return on ripped the bracet off.... seems there is a new occurence daily.  She wont look at me when I talk to her looks down,  If I nicely tell her something she needs to do she seems upset. I try to be loving I tell her mu stupid Cat stories which she likes, I've been doing this for 2 years.  Im very ready to find another option of course she doesnt want that.  Ive had Diarrehia for 7 months nerves I think, I go for a walk every day before I start with her.  I was told to just tell her I cant do this anymore Im sick and not explain any thing else.  Is this the way to go I have good resources in finding a place it just going to be hard.  She has lived in her home over 50 years.  Any Ideas Sharon