The more I study, the worse my mock scores

Hi everyone,

I've been following the forum for a few months now.

My background: I completed the full MGMAT set of books, the OG (although didn't complete Verbal as I felt my Verbal score was ok), and the MGMAT Advanced Quant. My target score is 720 (which seemed attainable at first). Lately, the more I studied, the worse my scores seemed to get.

Here are my scores:
1. GMATPrep 1: 690, Q45, V39, IR4
2. MGMAT 1: 680, Q44, V38, didn't do IR
3. LBS GMAT mock: 710, Q48, V41, no IR component
4. Kaplan free mock: 710, Q48, V40, IR1
5. Veritas Prep free mock: 680, Q47, V37, IR5
6. GMATPill mock: 610, Q35, V38, IR4
7. MGMAT 2: 670, Q39, V42, IR2
8. MGMAT 3: 620, Q45, V31, IR2

Although my scores are in the 600 range, the scores for individual components fluctuate greatly (more so than my mood swings!).

Generally, my Quant score is average (although two atrociously bad Quant scores for GMATPill and MGMAT 2 have really shaken my confident). My weakest areas in Quant are Word Problems (especially those concerning speeds/rates and combinatorics). I get a mini panic attack every time I see a problem that is over 3 lines long.

I thought my Verbal was good until I took the MGMAT 3 and scored an upsetting V31. In normal circumstances, I would have written it off as an outlier, but seeing as my scores kept dipping, my traitorous mind tells me I'm getting stupider by the day.

Now here comes the elephant in the room... The IR! As you can see, my IR scores are atrocious (I've run out of adjectives to describe my scores - sorry!). Seeing as my Quant and Verbal scores are on average quite ok (if you discount the outliers), I would expect my IR to be in the 60th percentile... What's frustrating is that I always got 2 out of 3 parts of a question right, resulting in 0 credit. Also, for some reason, I took very long to comprehend the questions, panicked when I had to do multiple calculations to arrive at an answer, and sometimes just simply gave up.

With such a huge range between my best and worst scores (Q between 35 and 48, V between 31 and 42, and IR between 1 and 5), I can't effectively gauge the level I am at. At this point, part of me knows I should take GMATPrep 2 as it is the most accurate indicator of my ability, but I am saving it for later.

Has anyone had a similar experience? If so, how do you bounce back? Part of me believes that my problems are mostly mental (unable to bounce back mid-test and panic at lots of data, esp. in IR and Quant sections). Can anyone offer some advice?

G-Day is in June. Thanks in advance!