Paranoid about cancer?

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Cancer can affect anyone, at any time. I have done alot of research and that is what it seems like. I am trying to get alot of whole grain in my diet and what-not, but it seems like that probably won't work considering it is so random. Cancer can kill you. That is what I am afraid of. Alot of people tell me not to be paranoid, but that does not work. I know I shouldn't be and sometimes I don't even think about it at all, but then I start thinking about it. I also get paranoid over every symptom or bump or anything. And the disease must be a big deal, ssnce the fact that there is a section just for it on Yahoo Answer's among others. How can stop being paranoid about it and just keep my mind away from it? Any helpful information on the disease will be appreciated aswell.
I am 15 for anyone who is wondering.