My mom was diagnosed with breast cancer,went through chemotherapy,then had the breast removed.About a year later, she got checked and the cancer had returned and had spread to the lungs.She was given 6mo.-1yr to live.She has some lumps on her neck,coughs constantly,spits up blood sometimes,has no appetite usually,throws up what she does eat,and usually just sleeps a lot.How can I tell when the cancer has spread to other organs and how long she has left?