Take it then donate it. There's women out there who can't afford them.
It sounds like your nurse may be taking her role just a little far. I've never really had a bc nurse just 10 minutes with one at the hospital so I don't know much about them. However, I would think that her role would be to help you understand it and possibly help to formulate questions but definitely not to replace the doctor. Hard to know whether she's overstepping or the doctor is offloading. It shouldn't be your problem though - get your questions ready and have them written down so that when you see the surgeon, you're ready.