Dear Narwoo
It's frightening stuff, but your doctor is doing the right thing. Two emotional people doesn't help at this juncture. I had a similar experience, looked like lots of affected lymph nodes, turned out to be only one, buy yes surgery and chemo.
Everyone is different in how they react to chemo ( physically and emotionally) but everyone will give you similar useful advice about preparing. Take someone with you when talking to your doctor and oncologist. Preferably someone not so emotionally involved, you want them to take notes and help you remember the important questions.
One or two days to think over important decisions may be well invested. Sometimes you can feel rushed to make a decision Try and give yourself a bit of time.
Very hard is to take things one step at a time - we all want to plan ahead, it's one way of coping with months of treatment, but you won't know till you start how you will go. I worked throughout my treatment, my choice and a good one for me,had no fatigue or nausea. Had a few other things, but by the time they happened I was better equipped to deal with them. One of the "advantages" is that you go from someone who is overwhelmed to someone almost blasé quite quickly!!
Think about who can support you best - friends can sometimes handle things better that family members (who are emotionally involved).
Very best of luck