My 6 mo. old yorkie is still not potty trained!?

I've researched heavily how to potty train dogs, and pretty much know the formula, but my 6 month old Yorkie (after 3 mos of having her) still seems absolutely clueless. And since I refuse to live in a home that smells like dog urine (I have carpet), her not going in the right place is kind of a deal breaker. I really want to keep her because we are getting attached to one another so I want to do whatever I can to help her catch on, so if anyone can suggest things that will help... Here's the situation. I work, so I do not require that she go outside. She has a bedroom and in that room there is a pee pad in the corner (away from her bed and food). All I ask is that she go there and not anywhere else in the house... When I first got her, I was surprised at how fast she picked up on using the pads, she seemed to never have an accident. Only once or twice. I seldom see her go, so she doesn't always get praise for using the pad, but she does when I catch her...and plus I thought she knew where to go and that training was done. I would let her roam the house unattended because of that. Well a few weeks ago I was vacuuming and flipped over my living room rug only to see 5-6 pee pee stains! I went in the kitchen and flipped over that rug - low and frickin behold! The bathroom - yep :(. My bedroom rug... OMG! She's not trained at all. So I remembered on her first vet visit the Dr. saying that she is not "ready" for the whole house and to leave her confined for training purposes. So I starting to leave her in her bedroom most of the time with a gate up. The room is off of the living room where she can see everything. But she cries half the time that she is in there. I ignore her, and only take her out when I can keep her with me; but it doesn't help. She pees and poos right in front of me now - she never did that before. And, she will have been in there for an hour, I take her out for 5 min and then she decides she has to tinkle! Today we were playing and she stopped running to pee right there on the carpet. Last night, she fell asleep in her bed that I keep in my room and I dozed off before taking her to her room. I woke up in the middle of the night to her peeing (on my carpet) next to her bed. Earlier that day, I had her in the bathroom with me while I got ready for work. And she squatted right next to me for a hefty sized #2! I'm all out of ideas. After three months, she seems to have made no progress and has no clue that she is not to go anywhere else but the pad. She uses it pretty consistently when she is in her room. But she does not know to go back to the room every time she needs to potty. How do I get her to come around!?!