You may want to ask the oncologist some of these questions. The surgeon is not going to be prescribing nor monitoring your chemo and it sounds like you are getting confusing information from the surgeon. It is hard, with so many doctors involved, but it is important to try and stick with the right doc for the right part of your care.
Chemo regimens vary, mine was one dose, with the next ones 3 weeks later. Some get them after 2 weeks now (under newer protocols) and other chemos have 4 weeks in between. Even others may have 2 weeks of oral meds and 2 weeks off, so there is a pretty wide range out there.
What chemo are you doing? That may help answer some questions.