I lost my youngest sister to brain cancer on July 8. I managed to stay strong for her and her young daughters while helping to care for her at hospice at home. But now my heart is breaking with such sadness and sense of loss. She was only 44 and because of our age difference, I've always thought of her as my baby. I'm having trouble sleeping and when I do manage to sleep I wake up crying knowing that it was not a nightmare. She is gone. I love her so much and miss her terribly. It was so…