This was written in our PM, before I had a chance to read this. I've since elaborated on it.
I'm sorry to hear that.

But you have to remember that with her age and health conditions, she now can finally rest peacefully. I realize that what you're feeling is unbearable, and your loss unimaginably tragic, but the sooner you accept her being at peace, the sooner you will be able to grasp on to that love that you had for her, and still hold on to. Even though she may not physically be there, the time you had together and the love you still hold on to for her will always be infinite.
I understand that you feel as though she may have thought betrayed. However, that's the thing about love. To be able to come off as the bad person, or appear to wrong the person we love, when in fact we do the things we do to protect them, save them, or even to have the slightest good effect on them, regardless of the harshness of our sacrifices.
It matters not if those who we love hate us, feel betrayed, or deceived. If our actions are meant for their betterment, in any form or amount, then we bare through those struggles because our love for them is so strong.
Purely remember that in times like these, it is not about getting over your pain of morning, but grasping back that love.