How can i best support my mom through her battle with skin cancer?

my mother is 60 years old and today is getting skin cancer removed from her nose. Luckily it is basal cell, and they do not expect any life threatening consequences. This is her 4th time having basal cell and she has had melanoma twice. I am mostly worried because she is in a bad emotional state right now. They told her that they do not know how much skin will need to be removed, and that she may be left disfigured even with plastic surgery to fix it. She is devestated, she would not let me or my father or anyone go with her to the appointment, only pick her up later because she said she is in a state of self pity and too embarred. My mother is the best mother in the entire world, she is responsible for all of my own success, and we are always there for each other. I just don't know how to be right now though, because she is keeping me at a distance on this one and because I just suffered my 3rd miscarriage a few months back (i have PCOS) and am still failing at TTC and it has sent me into a deep depression, and combined with that I have rheumatoid arthritis and have bouts of extreme pain, and am in one right now (i think the depression worsens it). I am trying to put my issues aside to support her, but admittedly going to school full time, working full time on the night shift, dealing with my physical issues, and my depression is exhausting me. How can I help my mother? She says I already helped her enough, because if not for me she would not have known she had cancer again, I have been telling her to get the sore on her nose checked for 2 years and when she had a bout in the hospital a few months back I finally told the doctors my mother refused to get it checked and they scheduled a biopsy after her release. She said she was scared to face the truth and that I pushed her and saved her life. But I feel I need to do so much more. How can I help my mother emotionally?