Hi Jasmin, I have a daughter named Jasmine. I am sorry that your brother isn't helping out more, but as you read it always seems like it is one person that does the most work when caring for someone. Don't really know why.
Your Mom was probably more mad at herself because she can't do some of the things and took it out on you.
You need to be kind to yourself because in my opnion care giving is the hardest job of all.