First yes 9 weeks is young so you need to watch her closer. Remember the more effort you put in now, the quicker and better her training will be. Think each accident is two steps backward, so try your best to avoid them. I would not worry about trying to get her to go outside now, its less confusing to just have her go on pad 100% now, its easy to get her to go outside later after she's 100% housebroken.
Use the crate if its big enough to keep her when you can't watch her or just need a break. Mine is 3' X 2' and I have a bath towel in front half and pee pad in back half. For first few day you need to watch and correct ("No") if she tries to tear up the pee pad or sruff the towel around. Try to put the crate where you are so pup see's you and gets used to it. Always use treat to crate her, never grab and throw in as this can get a bad thought of crate. Start with short periods (minutes) and extend times slowly leaving room, do not praise beg or show emotion when leaving or upon return. Starting young it will become a normal part of life.
When you take her out of crate after sleeping or after feeding take her to other pad and try to get her to sniff it or at least keep her in area till she pees. Remember One hour per month of age is max holding time so try to stay within those times to avoid accidents. We have gone
Start training "Sit", "Stay", "Shake", "Down", " and most important "No" now and practice daily. After about a week of good performance start cutting back on treats and getting random. When I say treats, never/seldom give full cookie, maybe size of pinky nail or smaller. Always praise immediately and get the treat to her as fast as possible on first few tricks so she associates the treat with doing what you command.
Our Ginger is 5 months on the 11th, she had one accident since she moved in with us. She free roams and only crates at nigh or when I go some where, she has never chewed anything but her toys, she was taught rules of house from day 2. Now it was tough watching her at first but it pays off handsomely now. The only thing she does now that we kinda grin about is she steals one of my wife's socks when she' getting dressed for work once in a while. She drops it instantly and you can see her grin, lol.
You'll hear Yorkies are sometimes difficult to housebreak and other things, I believe this is false and more a owner problem. A lot of Yorkie owners treat them different the other dogs, this can lead to other problems. Try to remember a Yorkie is still a dog and treat her as such. Your expectations will have a great influence on how well your pup performs.
Here she is a few minutes ago
http://i23.photobucket.com/albums/b368/owsi/004.jpg