Gemzar infusion

Fluffer

I’m stage 4 metastatic breast cancer patient. The only treatment left for me is an infusion of Gemzar chemo of which I don’t know anything about. They want to start the infusions in about two weeks. I was told if I choose to do nothing I have about 6 months; I have no idea how long I can survive on the infusion. I want to be able to make an intelligent decision based on comparing the two survivor rates. I get it that everyone is different, but there must be an average time. Any thoughts?