I never did any high level math like calculus in high school. I was in a higher level math class once though, and I didn't understand any of it, such as calculus (I also didn't have the previous foundation for that math, such as algebra since I slacked off really bad in my math classes the previous years), so I dropped out of the class for the more basic ones. And I didn't really find math exceptionally appealing (I went pretty well in it though), even though I've always had a deep fascination with physics. I'm thinking about doing a physics degree along side my current information technology degree (they would complement eachother well too), if I go with the physics degree, I'll have to go all the way to the PhD if I want to work in theoretical physics. But the thing is, I don't think my current math skills will cut it, I reckon I will struggle if I went for it, or I might just have an innate inability to do high level math.