I suggest asking the doctor what the prognosis is by staying on the chemo. My Mom died in Nov. 2007 at the age of 74 after a 4 month battle with PC. She tried Gemzar but she too could not have it every week due to her blood counts. Her doctor was very upfront that PC is not curable but treatable. She got to a point that she decided that she was more concerned with quality of life and wanted to enjoy what little time she had left.
there is some helpful info at www.pancan.org. It is the Pancreatic Cancer Action Network.