Thank you for sharing everything at your most traumatic time in your life Corvus. I cannot think of anything that you did not try already to help your mum. You have been immensely attentive and incredibly caring for her throughout all the health and hardships. Luckily she showed how much she loved you and truly did appreciate your continual assistance, even if she could not tell you directly.
Finally all her suffering here in physicality is now over. I will pray for her smooth and seamless passing, and her happy reunion with loved ones in spirit.
Please try to let go of the protracted stress and suffering you also went through, and look after, and love yourself as best you can now. Rest assured you did all that a loving and caring son could do. Plus all your knowledge that you tried to apply will serve many others, incuding yourself. for which we can be very grateful.
May you all find peace and comfort as well as a strengthened love for each other at this time. Big hugs