I got Lady at 7 weeks old too and they need a little more attention than those that come home at 12 weeks.You will need pee pads (although dont expect anything much until after 12 weeks) you will need food and water bowls,a comfy bed,a cuddly toy for the pup to cuddle up to (remember 7 weeks is REALLY young and she will miss her mommy and litters mates) or you can get a snuggle pupy which is perfect,heres the link:
http://www.snugglepuppys.com/ ,a hot water bottle to put in her bed (this does wonders!) and some nutrical (VERY important).I am in Europe and cant get nutrical here,so I had to use water and sugar in a seringe which also works if your baby gets lethargic.
As 7 weeks is very young,its best to have your baby near you at night..If you are going to crate her at nights,have the crate on the floor by your bed or somewhere you can just touch her every now and again to let her know you are there.After a while Lady knew I was there and stopped crying at nights,she was very good
You will also need a carrier at first because they shouldent really go on walks until their shots are completed,so if you want to take her anywhere at first,a carrier is a good option,unless of course you want to hold her
She will STILL need a tiny harness though because she will need to be secured inside the carrier to stop her jumping out.
HHmmm..what else??? Oh yes,puppy shampoo and a soft brush
If I think of anything else I will let you know
Good luck and congratulations!!