I would try taking AP Calc BC, if you say you're pretty good at math, then taking BC and passing the AP exam won't be too difficult, although calc is totally different then any other math class you have taken. Sometimes it takes some time to get it.
The last thing you want to do is take calc in HS and in college, that's what I did and it really sucked. However Discrete Stuctures and Statistics are probably more important in programming than calculus.
I would HIGHLY recommend you take a programming class in HS(C++ or JAVA) if it is offered because from what you said you aren't too sure what you want to do.
<< I am going to work with computers, probably programming and stuff like that. >>
From your sig, I tell tell you are a overclocking fanatic and you probably like "working" with computers. However programming can be a very difficult subject for some people and even though they like computers, maybe spend most of their day on them, programming may not be what they're looking for.
I would talk to some CS undergraduates at a univeristy and ask them some questions that you may have, heck you can post right here on AnandTech!