IMMUNOTHERAPY

Hi, I've just started taking Nivolumab as an adjuvant treatment after have a node removed in my upper left thigh.  Refused a complete node biopsy so hoping that this is going to help my system get into gear and fight anything that may still be lurking around.  Is there anyone out there who is further into immunotherapy treatment and can tell me when side effects may happen  (or not) and how they have coped with them?