WHY??!!?!

I think If I try to cram anything else into my head today my brain may swell and explode. I am studying for the GMAT (so I can apply to the MBA program at BYU). The GMAT is probably one of the most horrible tests ever. I took a practice test last night and realized just how much I have forgotten. Lets talk about the math section. It was like trying to take a test in another language. I recognized the words but I didn't know what they meant. Its not even stuff that should be hard, its high school algebra. But if my life had depended on it I still couldn't have figured it out last night. I was so mad at myself, seriously I got A's in High school algebra but it has been 13 years since I've even looked at it. I thought I was so clever testing out of math in college-Even the answer explanations in the book are confusing.
The English section was a little easier for me, I didn't totally fail that part. However, the ones I did miss are still frustrating for me because even after I read the answer explanations I don't always agree with them. Especially on the sentence correction...I still think my choice is the best and their explanation contradicts everything I ever learned in English. AHHH worst test ever! What in the world was I thinking?!?! I have to take it, I paid almost $300 to take it...but it just might be the death of me.