V32 / V33 is about the low to mid-60s in terms of percentile. Low 40s is around the 90th percentile. It is very unlikely that someone will be able to jump from low-to-mid-60s all the way up to 90 in 2 weeks. I know that's not the message you want to hear, but it's important to be realistic so that you can make an informed decision about what you want to do. (Note: this doesn't mean that you shouldn't
try to make that improvement, but you should have ideas about what you're going to do if it doesn't work.)
Basically, there are two possibilities if you aren't able to acheive that very ambitious improvement in that timeframe. Either you lower your goal score or you postpone your test date.
When you're doing SC offline, you are not answering adaptive questions, so you may be answering an easier mix of questions than when taking a practice test. In the OG, for example, the SC questions are presented in rough order of difficulty, so the higher numbered questions are the harder questions. How are you doing just on the harder ones?
EVERY SINGLE TIME you get something wrong, you need to figure out exactly WHY you got it wrong. If you don't know why, then you can't figure out what you need to do to fix the problem. So go back to your most recent practice tests and homework problems and write down all of the reasons why you got every problem wrong. Then, figure out what you'd need to do to avoid making those same kinds of mistakes in future.
On verbal, there are at least two reasons why you got a problem wrong, every time. (A) You eliminated the correct answer. Why did you think it was wrong? (B) You chose an incorrect answer. Why did you think it was right?
Now you know that the reason you thought the correct answer was wrong is not a good reason to eliminate an answer. And the reason you thought the incorrect answer was right is not a good reason to choose an answer. (Then, after that, you also need to understand why the right answer is actually right and why the wrong answer is actually wrong, of course.)
You also said:
i ended up rushing through the last RC
So you were rushing because you spent too much time somewhere earlier in the section. Where? Why? Did that extra time help? How much did that extra time cost you at the end? (If you got 3 or more questions wrong in a row towards the end as a result of having to rush, then the cost was more than the benefit you gained by spending extra time on earlier questions.)
You also said:
Another problem is that on most of the SC and CR questions, i am never sure if my answer is 100 percent right or not.
Are you possibly losing some time as a result of this? e.g., you narrow down to A and C, you think it's C but you're not sure, so you spend another 15 or 30 seconds going back and forth between A and C before finally choosing C. You're still not any more sure than you were before, but now you've lost 15 or 30 sec. Do that a few times and you'll run out of time at the end of the test. Pick and move on. :)
Here are some articles that might be useful for you in terms of how to study, but I just want to reiterate that you should think about whether you'd rather postpone your test or aim for a lower goal score, just in case you have to make that choice:
1.
http://www.beatthegmat.com/a/2009/09/23/evaluating-your-practice-tests (because you mentioned you're having trouble figuring out strengths and weaknesses from your score reports)
2.
http://www.beatthegmat.com/a/2009/10/09/how-to-analyze-a-practice-problem3.
http://www.beatthegmat.com/mba/2010/01/23/how-to-analyze-a-gmatprep-cr-question (read after reading #2, above)
4.
http://www.beatthegmat.com/mba/2010/02/01/math-in-critical-reasoning-questions5.
http://www.beatthegmat.com/mba/2009/11/27/modifier-madness-breaking-down-a-gmatprep-sc-problem6.
http://www.beatthegmat.com/mba/2009/11/03/breaking-down-a-gmatprep-scThe last 3 are to give you an idea about how to study, what to think about, the kinds of questions to ask yourself, etc. You can find the full list of nearly 30 articles here:
http://www.beatthegmat.com/mba/manhattan-gmat