Mock test scores

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Gave the PPP3 today, and I’m incredibly despondent now. As you can see, the mock test scores are all over the place. I was happy with the PP1 score, but that seems to be an outlier.

From the PPP3, I noticed that both quant sections were much tougher than any other tests I’ve given(including Manhattan/Kaplan). I always thought quant was my strong point as I seemed to be doing well, that is, before the PPP3.
Also in the PPP3, I thought that my Verbal was better because I employed more strategies but the results indicate otherwise.

Anyone has got any clue as to why the scores are ranging so much, and how do I improve? Could this be a result of over studies by any chance?

I give my GRE in 2 weeks and am losing all confidence now.