Advice concerning senior schedule -- AP calc?!

<p>I'm terribly HORRIBLE at math. Really, I just suck. I've never been good at it. Since 7th grade, I've always been able to somehow get a B every single time I get my grades in math, but not now. Even though I would get B's, I wouldn't really understand anything. Now all of that is just catching up to me. I am a junior and currently taking pre-calculus, and for my first semester I got a B. For the first progress report of this semester, I had an A. Second one I had a D. </p>

<p>What should I do next year?? I'm already signed up for AP calculus, because I want to take four years of math, but I'm afraid that I will get a D next year in that class and any UC acceptances that I may receive will be taken away. Should I take calculus over the summer at my local communtiy college? I don't know if I need to take a test to get into the course, and if I do, I'm scared that I won't pass it. I chose to take AP calc over AP chemistry simply because I don't think I can take them both. I didn't really want to, because I love chemistry and despite my grade in math, I always get A's in chemistry and understand it.</p>

<p>Should I just give it a try at taking it over the summer? :S Will it be even harder to pass it if I take it then?</p>