Editing Hurts My Head

I'm hitting a wall. I really want to put everything I can into these essays and finish the semester strong. It is my last semester of undergrad, after all... and, my GPA could use some help from this class. But, looking at these essays makes me want to pull my hair out. Seriously... I've been staring at them for the last hour, and I have a headache. And no, it's not from pulling my hair. I'm sick of them, ready to be done with them. I look at things I know need correction and think... "I can't do it. I don't know how to fix that." The longer I work, the more I feel like not only have I hit a wall, I am now slamming my head hard against it.