Dear Christy,
You must have loved your Grandma very much and I am so sorry for your loss. I would really encourage you to go for some grief counseling. When my Mom died 5 year's ago(not of cancer, fortunately of old age) I was devasted. She and I were VERY close, and like you, I would cry every day. I ended up going to a grief counselor for a few months and I can't tell you how much it helped!! Please keep an open heart/mind to it, and if you don't like it you can always stop. Your Grandma will always live on in your heart, and I bet she's your Guardian Angel now, watching over you!
Take care,
Shelley