How to remove yellowish-brown stains from crooked teeth?

Hi doctor,

I have my mother's wedding this month and would like a normal smile. Unfortunately, I have quite a range of different colored teeth. My canine teeth are very yellow, and my bottom teeth are all partly stained. My two front teeth are white, but I have some brown stains on them both. I drink a lot of tea, though, so I assume this is the reason why my teeth are like this. I also have crooked teeth at the bottom, making removing the stains hard. What would you suggest I do to have my teeth the same color and remove the brown lines? I do not necessarily want them whitened, just the same shade as each other. It makes me extremely self-conscious, so I would like them to look at least a bit appealing. I am 17 and still in school. Please help.