As much as they say it does not matter, I say stress plays an important role of the development of breast cancer. My dime store theory is...some of us have the unlucky ability to get it, and then toss in stress and maybe a cancer that was indolent now becomes invasive. My cheap theory also includes lack of vitamin D can also help cancer get started. ALL women should be taking Vitamin D everyday. And while we can never remove stress (it happens) be careful getting screened for cancer during those times. I think that some cancers such cervix can regress on their own. And try your best to stay focused and happy even during tough times.