I'm glad you're coming to "grips' with your Mom's death. i don't think you ever grieved her death before ~ and now you are. It's important that we TOTALLY grieve for our loved ones because if we don't, this grief will come out in some other form of emotion, whether it's anger, fear, or whatever.
But let me say that I'm so sorry for the loss of your dear Mother. Losing a parent is one of the most traumatic things in life, I think. I've lost both of my parents, and now I feel like an orphan! It seems silly at my age, but I don't care ~ I still feel like an orphan. I truly miss them, and I can always think of a thousand things I want/need to ask them or tell them.
God bless, and take care of yourself. Grieving takes time, so be patient with yourself. Hugs, Lee