Hi happyface101,
Are these two CATs the ONLY CATs that you've taken during your studies? The GMAT is a rather specific 'event', which you can train for, but you have to make sure that the 'details' of how you take your CATs 'match up' with the details of your Official Test Day.
When you took your CATs:
1) Did you take the ENTIRE CAT (including the Essay and IR sections)?
2) Did you take them at home?
3) Did you take them at the same time of day as your Official GMAT?
4) Did you ever do ANYTHING during your CATs that you couldn't do on Test Day (pause the CAT, skip sections, take longer breaks, etc.)?
5) Did you ever take a CAT more than once?
From what you've described, the V44 seems 'surprising', so you should plan to take at least another 1-3 FULL-LENGTH CATs before your Test Date (to make sure that your skills are consistently sharp across all sections). To hit your goal score, you'll have to score at a really high level in BOTH the Quant and Verbal section. To squeeze out any additional points in the Quant section, you'll really have to 'nitpick' the questions that you're getting wrong and define WHY you're getting them wrong.
GMAT assassins aren't born, they're made,
Rich