Wow, I don't know if I can help you since I got my second puppy on Friday and we are in the throws of potty training. She is a stubborn little girl
Anyway, check out the yorkie potty log thread since it is written by a bunch of YTalkers who are currently busy with potty training.
Just for interest sake, June sleeps with us on my bed (this is how I want it) and spends the day in her pen when we can't supervise and the rest of the day she is either cuddling or running around with Cash (my older yorkie). Before she is allowed to play with us, she has to go potty. We don't have a garden, but we do have a balcony. We take her to a potty pad on the balcony and she isn't allowed to leave the pad unless she goes. I really hope this works - it worked last night, but today she is boycotting all of it.
Good luck!