@Chloe07,
It's funny that I guessed 16. Dang, I should go play the lottery. And thank you for the ribbon.
True story - I started college majoring in Biology, then switched to Math. My undergrad degree ended up being in Philosophy, and I went to Law School. And I haven't practiced law in over 20 years. I currently work in IT, and am an aspiring author.
So, well, what I was 36 years ago (which is when I was 15 - egad, time flies) is not what I am now. I continue to find it weird that our society pushes people to somehow know what will make them happy for the following 40 - 60 or so years.
You have no idea. And that is perfectly all right. You will change, as will the world. Hell, when I was your age (now I really sound like a fogey), there was no Internet, and most people barely owned electric typewriters, let alone computers.
My suggestion to you is to worry a lot less about majors now. You will likely change and that is so perfectly acceptable that your college counselor is going to practically expect it from you. So don't sweat that. This is a decision that need not be made today. And, if you end up going to graduate or professional school, it won't matter much at all. Your grades will matter considerably more.
There are tons of other things to do - I barely listed a few. Here's a site which lists a bunch -
http://www.onetonline.org/ I realize that it's American, but the career clusters searches are really good. So, for example, let's look at the arts -
http://www.onetonline.org/find/career?c=3&g=Go They list everything from dancers to writers to broadcast technicians.
You can also take a look at your grades for, say, the last 3 years or so. What are you good in? What are you terrible at (I see you mentioned Math; I hear that)? Being interested in, say, physics, but lousy in math means that you're digging a deep hole for yourself. It's not impossible to get out of it but it does make your life tougher. It also makes it tougher to get good grades, as math is foundational for physics. For someone who wants to be a musician, they need to understand music theory, they need to be committed to practice, etc. They often need (or should) be physically fit, as those jobs can end up being rather physically demanding. Even people who sit in an orchestra have to sit there for a long time, at times.
As for tutoring, since you already know your weakness (math), it's probably a good idea. Find yourself someone who will challenge you and you will enjoy working with. It may take a few tries, and that's all right. But if you average at the C level and can get that grade up to a B, it'll open more doors for you.
Best of luck to you.