I vividly remember the moment my hair began to fall out. I was kneeling over a bath, washing it in a hotel room one Saturday evening, getting ready for my friend's 40th birthday celebration. Seventeen days earlier, I'd had the first of six chemotherapy sessions to treat my breast cancer, but days had gone by with no hair loss. I'd convinced myself I might be one of the lucky ones. But as I held the shower over my head, suddenly the stream of water turned dark, as long strands of brown hair