The thought that she will be rehomed if she messes up anything in the new house alarms me. Same as similar posts from other members... If your husband has half the say and this type of talk is serious then she should be immediately turned over to rescue. This kind of stipulation, even if the dog can't understand it, is not fair.
As for peeing where she is not supposed, welcome to yorkie ownership. While I agree that most dogs are trainable I also know for a fact that not all yorkies will be 100% potty trained. Mine is 12 and she goes on herself/in kennel constantly. Always has. Her breeder kept her and sibs in a kennel with newspaper.
This sounds like stress/anxiety/fear/uncertainty. If she is to the point of hurting herself she needs drugs. One of my dogs takes Prozac. He is totally himself, but easier to manage. It makes him happier. Heck, he used to constantly pick at the carpet and eat pieces of blanket. It got so bad that when kenneled he couldn't have anything to lay on. Drugs are a very good thing if used while training.
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