She's very cute! Looks like she may be a coaty when she grows up. And yes, many puppies whine a lot, why not let her come in while you take your shower? That way she'll understand what's going on and likely as not decide on her own that it's okay to wait for you outside of the bathroom...she's still just a baby! Let her follow you everywhere, it's a good habit to develop while they're young.
It's not the size of the dog in the fight, it's the size of the fight in the dog. Mark Twain