Junior that is really worried

<p>Hi, I'm a junior this year. To get to the point, I'm taking a bunch of hard classes that I'm really regretting. Specifically AP BC Calculus. I'm in a class full of seniors and the math just isn't clicking. Today, I received my first C+ on my transcript. I did fairly well with my other classes:</p>

<p>Symphony A
AP Physics A
AP Spanish A
AP English B
AP US History A-
AP BC Calc C+</p>

<p>Will this affect my chances of getting into UCs like ucla, ucsd, cal? I don't want to drop BC for second semester because it'll end up looking like I gave up but I'm really worried about next semester at the same time. Any comments are greatly appreciated. </p>

<p>Yes it will. But high tier universities realize the difficulty of said subject. Hence, potential leniency may be expected from their part.</p>