JDMBA
I took the test today and got a 670. Q 42 and V 41.
The first three questions of quant I could not find an answer. I ended up guessing between two answers. I spent nearly ten minutes on the first three questions. From then on I was playing catch up. What blows my mind is that I took a GMATPREP test yesterday and scored a 770 Q 51. I dont even know what to study for the retake.

Congrats on 670, not a bad score at all, especially for the 1st time.
From my experience, math questions that are tested in GMATprep is limited. The real GMAT has a lot more 'strange' questions.
I have no doubt that you can obtain 700+ in no time.