In June 2014, I was awaiting the birth of my second son, David, while juggling a demanding job and raising an 18-month-old, Noah, with my husband, Brad. We had just moved into a home in the suburbs to accommodate our growing family. We were living a fairytale -- the American dream.

Our American dream became a nightmare when, at 34 weeks pregnant, I noticed changes in one of my breasts. After a few doctors told me that my symptoms...