I am so sorry to hear of your grandma's passing. Keep remembering the good times and that will help get you through. I lost my grandma this past August and I know how hard it can be. Hugs go out to comfort you.
Prayers for you and your family. When my grandmother passed, I could hardly breath I was so distraught. It has been 10 years now and I still dream about her at night, but always happy dreams, and I can now think about all the wonderful times we had together as my life goes on. May you be able to do the same.