Hi, I would recommend that you perhaps restrict the areas of the house that you let your puppy go to make it easier to watch for signs. I pretty much restricted Obi to the kitchen and hallway (as I have carpet everywhere else) so if he did have accidents I could clean it up with no fuss. As everyone else has said, helpful to use a command too. I use "Off you go". It can be anything you like just be consistent with it. Don't worry, you'll get there soon enough. 
