Hi tmukogo,
There are so many different ways to prepare for the GMAT that it can sometimes be tough to find the right combination of resources that are perfect for you. If you've tried using a particular set of tactics/approaches for a certain amount of time and/or you've used a study resource that hasn't helped you to improve, then you have to look for other options.
The GMAT is a predictable, standardized Test - as such, you CAN train for everything that you'll face in the Quant section (and thankfully the "math" usually isn't too difficult). With Quant scores in the Q40s, you're likely missing out on a bunch of DS points and you're likely making some mistakes on "gettable" mid-level questions. You're also likely doing too much math and not using enough strategy, tactics and pattern-matching.
7 weeks is plenty of time to improve (and score 700+), but "your way" of approaching this process is probably not going to be enough to get you to that level. Some adjustments will have to be made - and you'll need to learn (and properly practice) some new tactics to raise your Quant score.
When it comes to taking CATs, you MUST make that experience as realistic as possible. If you do ANYTHING unrealistic (skipping sections, etc.), then the score results from those CATs will not be realistic and you won't be properly trained to face the stresses of Test Day.
GMAT assassins aren't born, they're made,
Rich