Hi dcl5110,
To start, Business Schools generally do not care if you retake the GMAT, so having more than one Score in your file probably would not impact your applications. That having been said, since you know the specific Schools that you plan to apply to, you would likely find it beneficial to speak with an Admissions Expert about your overall profile and plans. There's a Forum full of those Experts here:
https://gmatclub.com/forum/ask-admissio ... tants-124/Raising a 620 to the point that you could consistently score 700+ will likely require at least another 2 months of consistent, guided study - and you'll have to make significant improvements to how you handle BOTH the Quant and Verbal sections. Thankfully, the GMAT is a consistent, predictable Exam, so you CAN train to score at a higher level. Before I can offer you any additional advice for this next phases of your studies, it would help if you could provide a bit more information on how you've been studying and your goals:
Studies:
1) How long have you studied?
2) What study materials have you used so far?
3) How have you scored on EACH of your CATs/mocks (including the Quant and Verbal Scaled Scores for EACH)?
4) Are you planning to apply during Round 1 later this year?
GMAT assassins aren't born, they're made,
Rich