Hello,
I recently took my exam, after about 6 months of studying. I booked my test once I became confident I can do well. My practice test 3 days before the GMAT was 660. On the Official CATs I had 650 (CAT1) and 690 (CAT2, which I took about 7 days before my test).
The night before the test I didn't sleep well and my test was early morning. I was generally nervous throughout the test but really panicked during the Quant section, to the extent that I couldn't do basic math, got confused at every step, lost confidence completely, and mismanaged time. Although I completed all questions, I had to guess through a lot of them towards the end.
I ended up with 610 (v38 q36)

My verbal performance was sort of in line with practice tests, but my quant performance was terrible as I was achieving up to Q49 on my practice tests. I think the panic attack had a lot to do with it, but I was hoping I can reach out to the community here for advice on how to improve my score. I am planning to resit my exam in about a month's time as I want to apply for R2 deadlines.
Any suggestions, tips, study plans etc. will be helpful