If she is pottying in her crate then you could try a different crate. If that doesn't work, you may as well give up on that method and try something different.
Does she sleep in the crate at night. If so then when you get up, has she already pottied? If so then maybe you need to get her up during the night, and stop her feed earlier in the night.
Mine usually eat their last food at around 5, I put them to bed at 10, but they fall asleep ariound 9 and sleep till 7:30. This has been their schedule since they were 9 weeks old.
When you take her out, are you walking her or just standing. Walking stimulates the urge to potty, plus it will tire her so she will rest, then when she gets up to play, take her out again. Take her out after every nap.
If your breeder did not train properly that could be a problem. Don't change pee pads so often, leave the pee on it, pick up the poop.
DO NOT allow her to run unsupervised. When you cannot watch her she should be confined to an x pen or a laundry area, bathroom etc. with a bed and water and a pee pad.
One breeder wrote that she thinks the potty area should be divided off from the play area, so they actually have to go through a doorway to potty.
Here is a link to that site, scroll down to where it says Tips on paper training
http://www.dogbreedinfo.com/whelpingphotos7.htm
PS You do not have a teacup yorkie, you have a small yorkie.