You can totally get a 30+ in four weeks. (Need evidence? Check out some of the recent MCAT threads, like the one from 4/16/2011 - many people list their every score for every practice test. You'll notice an uphill trend, despite the "increase" in difficulty.)
As ModusProbandi suggested, review your every answer - the ones you got right, the ones you got wrong. That will help you fine-tune your approach to each question so that you can better think like the test writers for AAMC 4-10. Recall your thought processes - why did you answer this way? If you answered correctly, does your thought process match what the explanation states? If not, do you see why you were wrong or why the other answer is the "best answer"?
For tips on how to improve, check out the 30+ thread to read how others managed. There are also plenty of hints.
It looks like your PS is pretty good (especially for a first exam). Do verbal passages every day, and that will help bring up your verbal score. There's also a thread by LostInStudy/QofQuimica? on Verbal Strategies. Read through these threads when you have some "downtime", like during your lunch break or after your day of studying.
Since this was your first exam, you just need to do what everyone finds themself doing after that exhaustive sucker, and that is learn to concentrate. When you are in that proctored situation, there will be random fans creaking, computers buzzing like they are from 1976, and people coughing like they have TB in the middle of July. Practice focusing and shutting everything out except your thoughts. If you can't do that, buy ear plugs. (I like to go to Starbucks and study so that I can hone in on my thoughts)
Hope that helps!
