Grandmothers
I hate to be cliche, but I know what you are going through. I lost my grandmother in 2001. She helped raise us when we were children. My evil stepmother kept us from seeing her for years (since I was 12), but when I went to college I racked up phone bills calling her, but I eventually lost touch with her. I finally went to visit her in 1997 after not seeing her in 13 years and not talking to her for 4 years at a very scary nursing home and all her memories were jumbled up (they were still there, just the order of events weren't). It was heart breaking. I was one of her pall bearers (she didn't have enough sons left, only two of the nine she had had were still alive). It hurt, but it was made a little easier by the fact that my father had died in 1997 (the reason I went to see her). She was survived by my two living uncles and my two aunts, sixteen grandchildren (of which I was one), eleven great-grandchildren, and one great-great grandchild. She was born the year Mark Twain died.
Sorry about the rambling. I just ask that the Lord comfort you in this time and grant you a safe trip there and back.