My Mother lives with me- I truly do not know what to do.

Hello. I’ll try to get to the point as I have questions. Needing feedback as for the first time in my life I truly do not know what to do. Here are some facts. My mother lives with me. It’s her, my son and my dog. She’s wheelchair bound. She’s in heart failure, diabetic, arthritic, and on lots of meds. She’s always cold so she has the heat up to 77 most times. The quality of life I’m sure is overwhelming and depressing for her along with the pain she experiences everyday. However, our quality of life now is greatly affected by her ailments. The blinds are always drawn, no windows open, too hot in the house and her anger. She has outbursts seemingly over things in her head or as she sees them and not necessarily on reality. She says she’s unloved and I don’t care about her. It’s taking its toll. She won’t go to assisted living and quite frankly I’m afraid for her because she’s so nasty that I think she would be abused. My father left her when I was 15, I am now 49 and she more or less became a recluse. She does not see how she impacts our lives in a negative way. She needs a special diet and I can’t really afford to supply it. Additionally when she contributes she complains after that she hasn’t any $$ for herself. So no matter what she’s complaining and/or nasty. Because she’s “sound” no one can force her to take tests of her brain or medicate her. If I do speak to her doctor as I did once she gets irate once she figures out the questioning was as a result of my urging and I’m flooded with I’m trying to get rid of her. As she worsens I feel stuck and wishing she would be taken away. I know that sounds horrible but my son is special needs and I have her too. My son is a joy and not a “problem”. I’m tired of her berating everything from how much food we do or don’t have, how it's prepared and how she hates her life. It’s not healthy for her or us. I need feedback please. Suggestions or any kind. The outbursts happen often enough that tip toeing in my own house happens a lot. Sometimes she tosses things around and she’s broken my pantry door in one of her fits. I need help. I just don’t know how to get it or carry it out.