Answer:
Ask your mum to set up an appointment with an orthodontist for you. He may say that you actually do need braces. To you, it might seem like the only problem is your two crooked front teeth, but he might discover other problems that need to be fixed as well, and usually braces are the answer.
For whitening your teeth: First of all, remember to brush and floss your teeth twice daily. It removes the dirt on your teeth, and if that dirt isn't removed, it turns into plaque and makes your teeth more yellow. If you already do that and still want whiter teeth, maybe use whitening strips, or whitening toothpaste. Also, if you drink a lot of tea/coffee, that might be one of the reasons your teeth are yellow. If so, maybe cut down on the caffeine.

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Actually , my sister just got an operation two straighten her two front teeth, it wasn`t very expensive, about 100 euro per tooth . She was in pain for a couple of days , but now she never looked better . So just talk to your doctor , tell him to fill out an application for you to have surgery . I hope this helps
you will need braces or clamps fitted to train the teeth to grow straight agin,as for whitening,use a good toothpaste like beverly hills or arm and hammer,the first one i use and its pretty good to remove stains.
Im afraid thats all you can do ;P, its dangerous to start poking at them because they can brake or crack :s