Please keep a watchful eye on that lump and best of luck. I found my lump while doing a self-breast exam. I had ductal breast cancer. My lump did not show up on a mammogram. Many young women's breasts are too dense for mammograms to show lumps.
Nutrition plays a huge role.
There is nothing out there that is a definitive prevention method, but keep eating right, getting rest, staying in shape, researching antioxidents, and speaking to medical professionals to find out what's right for you. Never underestimate the importance of physical conditioning. Chris, I still have goosebumps from your speech when you were with Peter Lowe in OH last year. I wish more people loved with the same intensity and commitment you and your wife do. Stephanie, I admire you and your strength through your battle with breast cancer.