I have been right where you are. In fact, when you post about your house and your dog, and your over confidence, I can sit here and go, "Yup, me too." My dog is 9 months old. He is getting really good at house training. Do you have a crate? I think that was the best thing for house training. If you Google "crate training" you can find some really great info.

Know you aren't alone. It's a good idea to work with your p-doc.