Hi Edeler,
With a 440, you are closer to a 500+ than you probably realize. In addition, to hit that type of Score on the Official GMAT, you do NOT need to correctly answer ANY questions that you think are too hard or too weird, but you do have keep the little mistakes to a minimum on everything else. Based on your one practice CAT/mock Score, you have the opportunity to pick up significant points in BOTH the Quant and Verbal sections - and you really only have to pick up a few points overall to hit your Score Goal!
You probably should not 'rush in' to take your Official GMAT until you have a few additional practice CAT Scores though. With just one Score, we don't know how accurate this one assessment is (you may have gotten a bit lucky or unlucky on this Test, meaning that your actual 'ability level' is higher or lower than this 440 implies). Since the process of taking (and reviewing) a CAT requires a significant amount of energy and effort - and takes time to 'recover' from, you should not take more than 1 FULL CAT per week and your last CAT should be taken about 1 week before you take your Official GMAT.
I suggest that you study as you choose for the next week, then take a new CAT. Once you have that Score, you should post back here and we can discuss the results.
1) What specific application deadlines are you facing?
2) Going forward, how many hours do you think you can consistently study each week?
GMAT assassins aren't born, they're made,
Rich