@dawnblair33 I am so sorry about your mom . Cancer is always so difficult for everyone.
There are 2 things you can think about:
Set aside your anger at the entire situation and realize that you can’t change what happened . Maybe there are ways that you can help the women going through treatment now. Turn your anger into positive actions!
Write down questions you may have and make an appointment with the doctor or nurse practitioner/physician assistant in the office. Without anger, ask your questions and let them explain cancer and it’s difficulties. Knowledge is power; the power to help others understand.
I was an oncology nurse, until I retired, and I encountered many situations like this. It was never easy, but we did our best to help families cope with their grief.
Do you think you might you might try the suggestions?