Kris,
It seems the word "Normal" now has a different meaning. Because as we know things will never be the same. Kris, I know you did all the same things that we all did for our parents, so don't second guess yourself now. (Although I did the same exact thing at about 1 month, "what if I did this? What if we did that?") I finally resolved that there will never be answers to those questions. They will always pop up, when you hear new treatments or see something work for someone else.
I have a hard time talking to Dad about his greiving also, I think he feels he still must be strong for the kids which are now 52, 48 & 44. But to him, we are still his kids and by him not saying things, he feels he is protecting us.
And I being the oldest daughter, feel I have taken a more motherly role for us all. I know I can't replace what she always was, but someone needs to take care of him now. I just keep watching him so closely, listening to his every word.
Being as close as you are to your mother, in time, you may even do the same. I sometimes feel, I must put my feelings aside to care for his. You sound like you are doing the same. We need to give things more time, as they keep telling us, so hang in there. I am listening.
Dona