Freaking out about AP PHYSICS C!

<p>Ok my teacher finished teaching E+M right at the end of March and right now we are reviewing both Mech. and E+M and I simply do not understand anything at all right now. We are taking previous AP tests for them and I'm getting scores of 2 or 3 (if i'm lucky). I'm taking Calc AB right now so it's not the calculus. </p>

<p>Is there anything I can do to actually understand this stuff? I already have Barrons and PR and have been reading them extensively as well. Which topics are the most covered on the test? Anyone help?</p>