my dog pees in the house

Maybe she's anxious, or maybe she can't find the potty?

My shi tzu sometimes does this mostly when she can't find the potty (we always set up rags around the house where she can pee). So, for example, when we accidentally close the door and she needs to pee, she sometimes pees where she is.

The "deliberate" part, though, always happens when she gets into the bed. I think it's because she just wants to do it, or maybe she just wants to make her presence felt whenever she lies down on the bed. Now it doesn't happen anymore, and now she can sleep comfortably there.