Am I An Experiment?

A few days ago, I went for "chemo training." You know, what will happen, what to expect, that sort of thing. I was told I would be on a combo of chemo and Herceptin for five months, then surgery to remove any cancer that survives, then seven months of Herceptin alone. My oncologist told me I would be on chemo for a year with only five months of the Hercepin. So, which is it? I don't especially like my oncologist, don't feel that she's listening to me or my concerns. I told my friend of the treatment plan, and he said that protocol makes no sense, chemo is never given for such a short time. Which leaves me wondering, "Am I just an experiment to them?"