Adolesence Aggression?

Hello again,
My dog, approaching 6 months old, is going quite crazy. Whenever I take her out for a walk, everything is fine and dandy. But, whenever an object or place interests her, she pulls on the leash to try and get it. If I refuse, she will start yelping as if I am torturing her and bite her leash. Whenever I sit on the sidewalk to let her calm down, (this trick usually works) she starts playing tug of war with her leash. I am quite a distance from my home now, so I try to drag her back home, and carry her the rest of the way. When I carry her, she goes crazy, biting the hand that I use to hold the leash. I have several injuries now, and it is getting unbearable. Her leash is almost totally in shreds, and I've tried spraying her with some water. She stops, but only if she sees the water sprayer. I don't want to depend on the water sprayer, and I've stopped giving her walks now. If I don't want my dominant hand and leash to be ripped into shreds, what do I do? One of my friends told me to go to a shelter if it goes too far, and I don't want her to be one of those sad souls in the kennel. Also, some other things, (I don't know if this is important) she is not spayed, and she calms down immediately after I bring her home.

Edit: I've tried holding her still, she still bites me and rages on and on. She is such a little demon that my neighbors give me and my dog concerned looks when I walk her. I've tried ignoring her, she calms down but immediately starts the cycle again as I stand up and walk.