Hi VictoriaM22,
It's occurred to me that you'll likely receive some additional advice if you post your story in the Shared Experience sub-Forum here:
share-gmat-experience-8/Test Day is a rather specific 'event' - the details are specific and they matter, so you have to train as best as you can for all of them. The more realistic you can make your CATs, the more likely the score results are to be accurate. The more you deviate, the more "inflated" your scores can become - and that's likely what's happened here. By skipping sections, taking the CATs at home, taking the CATs at a different time of day, etc., you weren't properly training for the FULL GMAT 'experience.' This is meant to say that we have to question these practice CAT score results.
Thankfully, this is a relatively easy set of problems to fix. The big question now is "how long will it take you to properly get 'used to' taking the full GMAT?" You'll certainly need a new set of practice CATs to work with and you have to put in the necessary time to train your brain (and body) for the FULL GMAT. You might also need to invest in some new GMAT training materials. I suggest that you take a new, FULL-LENGTH CAT (with the Essay and IR sections) sometime soon. Based on that score result, we can discuss how best to continue studying.
GMAT assassins aren't born, they're made,
Rich