It is only in the case of invasive cancer of the cervix that hysterectomy may be the treatment of choice. My doc says I don't have cancer? What does this mean?

I was told I had CINIII & needed cone to determine type of hysterectomy to have. Cone on Monday, Hysterectomy on Wed. within 72 hrs. Anyone with info please respond. 45, 2 kids, husband vasectomy.