Hi dreamingofbeing,
I'm also a PCA/CNA about 6 mo. in on a new GYN/ONC floor. Here, we're called OCA (Oncology Care assistant). Just to confuse ya more.
Expect to learn a great deal! I'm not sure if you're a student, but my time here has already sharpened my skills and taught me new ones that will be a wonderful benefit to nursing school.
I also came from from a rehab setting, and here, the major difference is becoming familiar with the surgical, chemo, and hospice patients. You'll learn many new procedures (i.e. Gamma Knife), medications, and, in regard to hopsice, learn to appreciate end of life care a bit more.
Jump in, ask questions!
Wish you the best,
Chandra