Dear skp2bear,
I just found this thread and I'm deeply sorry for your loss. Loosing a parent always is loosing a part of oneself, and I know from experience that there is little consolation in words. Don't try to bottle in your feelings, whether they be grief, anger, disbelief or anything else.
From the bottom of my heart, I wish you the ability to let go of the pain your loss created over time, and that you can grow on the experiences, especially the love and trust, you had with your mother. Know that you are loved by many people here and therefore never truely alone.