Bad AP mark

<p>I just took the AP Psychology test today, and I'm pretty sure I messed up. (probably will end up with a 2 because I completely omitted the first essay) </p>

<p>I was wondering should I just leave it be and not report it on my common app (can I even do that? I don't think it will show on my transcript because I self studied)
or cancel the score?</p>

<p>and will APs help you much in admission? </p>

<p>I am an international student (from Canada)</p>