Hi altairahmad,
A 630 is a strong initial CAT score (the average score on the Official GMAT hovers around 550 most years). Many GMATers face pacing issues in the Quant section, the Verbal section or both – so you are not alone. However, it's important to remember that pacing problems do NOT exist on their own - they're the results of OTHER problems. One of the great aspects of GMAT questions is that they can almost always be approached in more than one way. Thus, you have to be careful about assuming that because you correctly answered the question means that you are approaching that question in an efficient way. From what you describe, there are likely a number of different issues with how you work through questions (including the Tactics you use, how you take notes, how often you waste time doing work "in your head", etc.).
Raising a 630 to the point that you can consistently score 720+ 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.
1) When are you planning to take the GMAT?
2) Are you planning to take the At-home GMAT or are you planning to take your GMAT at a Test Facility?
3) When are you planning to apply to Business School and what Schools are you planning to apply to?
GMAT assassins aren't born, they're made,
Rich