First question: have you already done your Post-Course Assessment (PCA)? This takes place after your 3rd CAT - but you have to sign up for it. It's a phone call with an instructor to develop a study plan.
It's only available for 1 month after class ends. If you are still within that time, look in the Office Hours section of your student center and sign up right away. If you are more than 1 month out, call 800.576.GMAT and ask very, very nicely whether there is any way you can get an extension.
You also need to analyze your own study habits and CAT data.
First, read these two articles:
http://tinyurl.com/executivereasoninghttp://tinyurl.com/2ndlevelofgmatThink about how what you've been doing does and doesn't match up with that and how you may need to change your approach accordingly.
Then, use the below to analyze your two most recent CATs:
http://tinyurl.com/analyzeyourcatsBased on all of that, figure out your strengths and weaknesses as well as any ideas you have for what you think you should do.
If you haven't already done your PCA, do this before your PCA and share your thoughts / conclusions with your PCA instructor. If you have already done your PCA, then come back here and tell us; we'll tell you whether we agree and advise you further. (Note: do share an analysis with us, not just the raw data. Your analysis should include a discussion of your buckets - you'll understand what that means when you read the last article. Part of getting better is developing your ability to analyze your results - figure out what they mean and what you think you should do about them!)
Of course, you can also do both: your PCA + continue this thread here. But if you haven't done your PCA, definitely do sign up for that (or try to get an extension). It's like half an hour of free tutoring.
p.s.
My % correct in PS took a nosedive from 45 to 32 while my % correct in DS went from 53 to 80...
How were your average difficulty levels? Since this is an adaptive test, things can happen - eg, you do really well on DS and happen to get a harder mix of PS questions, and so your PS performance suffers. Or did you make more careless mistakes than usual? Or did you mess up the timing? Etc. This kind of analysis should be part of your big analysis, above.