I need advice about staying in the hospital [View all]

I have my mastectomy tomorrow. I know I'll be staying at least overnight, so what should I bring? Is it okay or foolish to "sneak in" OTC meds like Neosporin ointment (I need it for my nose, believe it or not)? Will they let me wear my own clothes and slippers?
I've been using prescription meds for digestion (sorry diarrhea sorry), but I assume the drugs they'll be giving me will knock that out.
Any tips would be highly appreciated! And they'd better have Wi-fi!
I haven't gotten the call yet, and I'll ask most of my questions then...I'm just trying to keep busy today, and to be as prepared as I can be.