Let me tell you something, for the longest time Roxey would do the same thing about going potty. Not all dogs are easy to potty train! Like Karen said, WAIT, WAIT and then WAIT some more, it WILL pay off!
And the chewing I think most EVERY dog is like that, Roxey sure was, and still sometimes is and she is almost 11 mos. old!
Just be patient and you'll win the battle! Have faith!