My mother (67) is continually getting worse in my opinion. What do I do?

Hello,

I am not sure how to respond. My mother is 67 years old and continually getting worse in my opinion. She survived breast cancer a few years back and has not been the same since. Since that occurrence she has condemned herself despite what the Dr’s were saying. She believes she is crazy and losing her memory, but she refuses to go to the Dr. She gets obsessed with things (literally) and will not drop them; my sister, objects moving around in the house, how horrible she feels, phone calls; she will alternate between calling my cell and home phone till someone answers. She has been committed (pink slipped)2 times (suicide attempts), both time released after 3 days but she will not take her medications. I was the one for years saying everything is okay, it is human to have memory issues. I am now thinking she is right and I was wrong. Even looking at her eyes, she appears to afraid and they are opened more widely than normal. She insists on having her independence. I could not afford a home for her even if she was willing. What do I do? How do I respond?

Help me please. Lost and confused.