Hello,
I'm sorry your mother is going through this. Your questions are intelligent and well-thought out. Your mom is fortunate to have you advocating for her.
In short, I don't have answers to your questions. I strongly believe that what your mother needs most it to be treated by a team of Aplastic Anemia specialists at a Center of Excellence. I identify with your frustration that the doctors treating your mother appear to be unqualified. I'm convinced this is a common situation unfortunately, as aplastic anemia is so rare. One of America's foremost Aplastic Anemia doctors urges patients to get seen quickly by qualified hematologists, as per link below:
https://www.youtube.com/watch?v=02rvFOFYOVw
I began my treatment in a hospital where the doctors were not familiar with aplastic anemia, but switched to a hospital where there is deep expertise in treating this disorder (PSL/CBCI in Denver, CO). Six years post treatment, I have recovered quite well. I feel great, my counts are good and stable, I have my life back.
And treatments continue to improve, as per link below. There is hope for your Mom, but I feel strongly your questions need to be answered, and she need to be seen, by qualified experts.
https://www.youtube.com/watch?v=ECQRfjDWRvE
Best of luck to you both,
Kevin