How do I decide whether to have Chemotherapy?

Hi All
i had lost this thread, but its turned up again!! My appointment was not what I expected. My results showed that there were cancerous cell in my sentinel node. So i now have to go back for more surgery ( was offered 22nd dec but opted for 5th jan to enjoy christmas) a full axillary clearance. After then i should know my plan. I am assuming it will now be chemo as more areas affected.
Gill x