I stopped this behaviour in my play obsessed Yorkies by (1) taking them for daily walks, (2) putting away all play toys until I decide it's time to play and (3) engaging in dedicated and challenging play sessions outside, not just mindless throwing or tug games.
You need to establish control over the toys and play time, so that your Yorkie learns that you start and stop the action, not her. Your dog shouldn't tell you when it's time to play, you should tell her. Develop a clearer on and off system with your dog by giving her a "play" and a "finish" command. Then, tire her out with regular challenging play sessions and long walks.
You really need try to take her for more walks. Dogs have a primal urge to walk and run, and they will become obsessed with other things if they can't release their energy somehow. Develop a schedule that your puppy can stick to, so that she knows that she will get played with every single day.
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