I am so sorry for your loss. My mother died unexpectedly too of a massive heart attack when she had no history or problems before that. I wish there was something I could say or do.....it seems the first few days everyone focuses on the arrangements etc and all you can do is feel numb and go through the motions. It's after all the well wishers have left that really starts the grieving process. The one positive thing that resulted from my mother's death is that I was referred to a grief counselor and she literally saved my life. It's so important to have someone to talk to, especially now as everything must seem so surreal. My thoughts and prayers are with you...