Just scored 380 - Absolutely Devastated

I scored a 380 on my first attempt at the GMAT. I believe I tried to absorb too much material in too little time. I only prepared for about 4 weeks. My preparation included studying from the Princeton Review Study Guide, working the practice bin questions, and completing 2 full length tests (in test environment) provided by GMAC.

What really has me shaking my head is the fact that I scored a 490 and a 520 on the two full length practice tests! I am only required to score a 470 on my GMAT, so I felt I was in pretty good shape.

During my test, I felt I got off to a great start with the AWA. Then moving into the quantitative, I felt I was able to keep the momentum somewhat. It seemed as though I was getting medium to hard questions for the mostpart, so I felt I was on target to reach my 470 goal. I know from studying that I was in trouble with geometry, and I knew I'd have a difficult time with data sufficiency.

I really struggled with the Verbal questions. Through my preparation, I made great strides, and started feeling comfortable with Critical Reasoning. I knew I'd struggle with sentence correction, but I believed I knew enough of the rules to get some questions correct. What baffled me was the difficulty of the Reading Comprehension Section. I had a very difficult time understanding the passages, and therefore felt I was taking wild guesses at the answers.

Guys, I'm not going to make excuses for myself, because that's not the type of person I am. I failed miserably, and last night when my score popped up was the first time I actually felt stupid.

How can I recover from this shlacking, and score a 470? I refuse to take the test until I know with 150% certainly that I will score 470, because I don't have the money to continually invest.

I am really seeking some good, sound advice. Thanks Guys!