CLL immunoglobulin treatment questions

Last June I was diagnosed with CLL, I was told they caught it early and since I am only 37, my dr assumed I would be fine for years to come.  I quickly moved to a stage 1 and my last blood work showed that my immunoglobulins have dropped significantly.  My new oncologist says that if this trend continues I will have to be on treatment after my next appointment (in May).  I asked about what kind of treatment it would be, she said that it depended on what that day's blood work showed.  Does anyone know what this might look like.  I did some research on line and it looks like I might have IV anti-bodies instead of chemo, so I'm curious if there is anyone who has any insight into this.  Thanks