2a, 0 nodes, then 2yrs later bone and liver mets

It's been a rough 2 years, now they are telling me I am terminal. I'm 30 years old, with 3 young children. My oldest is going through chemo for adrenal cancer (we have a genetic cancer) and all my children tested positive. Now I am going to have rads, cause I have bone mets in a lot of places and liver mets, probably even some stomach mets. I have so little hope that I have much time left. Yet, I don't feel much like I will die any time soon. I have a little cramping in my stomach area, my back hurts a little, my chest bone, pelvis, knees, and heels are a little creaky and sore, and that's about all I can really complaign about. But yet I feel like there is very little hope. I will be taking Herceptin, Taxol, and Paraplatin + Rads. I don't know what they are going to do about the liver and possible stomach mets. I'm not thinking they can really remove my spine mets either... How long do people tend to live with this big of mets?