What I'm feeling when I heard free writing right now

Saturday is important to me cause I have to take an exam which from GMAC. Even though I kept working on it everyday, I feel stressful and can't focus on subjects of ELS, especially R&W. In our R&W class, the first essay is about argument, but I don't have clearly logical thinking that I really needed. My mind has totally messed up during these days. I think I have too much stress to the test and I need to calm down and release myself.