Danielle Harmon thought she was too young for cancer, but at age 31, she was diagnosed with invasive breast cancer following a routine well-woman exam.

The mother of a 1-year-old boy, Sam, was shocked. "I just cried and cried. I thought, 'I'm going to die ... I'm not going to see Sam grow up.'"

Danielle was concerned that her husband Jason would have to raise their son alone. A Houston area resident, Danielle says...