Hi Stevi, welcome to YorkieTalk!
I kinda disagree with your vet...I got Sophie from a breeder at 12 weeks and she was already almost 100% pee pad trained. I'm still working on outdoor potty training with her but with the cold weather here in Ontario right now she prefers to hold it and pee inside.
Congratulations on your up coming wedding! I look forward to seeing more pictures of Loki and Ryder. They look adorable in your avatar picture.