You are giving her far too much freedom, too soon. Yelling at her just makes her deaf to your voice and whatever words you may be saying, in this case, "No". Also, the word No tells a dog nothing, really. WE know it means to 'stop everything you're doing right now!' but to a dog, particularly an untrained puppy, it's just a noise. If someone kept yelling "BLURP!" at you, you'd start to back away, you'd feel a little anxious for being yelled at, but you would have no idea what BLURP! means.
Take a step back. Keep her on a leash attached to you if you need to go through the house, or set up a secure area for her to play in. She does NOT need the freedom to be in whatever room of the house she desires. She can be perfectly happy in a small kitchenette for all she cares, provided that there is something human-approved to do. :)
No problem. :) Remember at this age that pretty much any time your puppy ducks out of sight, it's probably to do something mischievous - sometimes to pee, others to go destroy something! :D
It sounds as if she has a lot of pent up energy to burn. How much walking is she getting? As young as she is ,walks should only be about 15 minutes at a time but should be frequent. A tired puppy rarely causes trouble.
Wait puppies listen? Can I have one...my puppy is driving me crazy. I am going to have to try the leash thing, only problem with that is he wont MOVE on a leash :(