I copied my response to you from what I posted on Starlight's post because I want to be sure you see it...
If I remember right, your mom lived with you for over 20 years. Please don't be so hard on yourself. It was only these past few weeks that you were so burned out and honestly, your mom would not have realized it. Knowing that your mom had Alzheimer's, as mine does, I can say that and know it to be true.
Caring for the elderly is so difficult, especially when you've been doing it for as long as you did and then through Alzheimer's AND cancer. Bridget, you are an angel, you truly are and you have my deepest condolences.
My mom is entering the end stage of Alzheimer's and I am dreading it, watching what she is going through. This whole journey has been so painful and it seems to become even more painful with each passing day. She still knows me and my sisters, at least most of the time, but that is about it. She does still come with me on Sundays, but she becomes so confused, I don't know how much longer I can continue to take her out to my home. Bridget, your feelings are normal, you are grieving and missing your mom. There will come a time when you will be able to remember your time with your mom with fondness and not feel so much pain. You are a wonderful daughter, please remember that. You did for your mother so much more than most. I will keep you and your family in my thoughts and prayers,