HUGS Isabelle!! I'm so sorry for you and your family.
I lost one grandma in 1993 and it was very hard to take. But Life2k is right, the sadness of losing her will be replaced with happy, warm memories that will live on with you for the rest of your life. My maternal grandmother and I had a 'lucky' time of the day and now that she's gone, whenever I look at the clock and it says '7:11', I say a little hello to her.