Not 100% if you should retake but I have a similar problem. I scored a 17 quant and 41 verbal, netting me a 510. I have since taught myself all of the math fundamentals and have only achieved a 600 overal (43 quant, 30 verbal). I dropped 10 points! Anyway here is my question. Did you have a hard time focusing on the reading comprehension/critical reasoning and did it take you awhile to draw conclusions? If you're a recent college graduate you should be capable of a pretty good verbal score because you have been reading a ton of material and have also been accustomed to correct sentence structure because well, you only read well edited textbooks. Congrats on the quant improvement, I guarantee if you relax for the next month and just read more (the economist, wall street journal) I bet your score goes up and you achieve the 650+ you're capable of. You haven't gotten any "dumber," since your first test and I can't imagine the first score being luck, just relax and read.