Hi Deeptanshu02,
Raising your current scores to the point that you can consistently score 750+ will likely require at least another 3 months of consistent, guided study - and you'll have to make significant improvements to how you handle BOTH the Quant and Verbal sections (including all 3 major Verbal types: RC, SC and CR). Thankfully, the GMAT is a consistent, predictable Exam, so you CAN train to score at a higher level.
In addition, if you think that there might be 'weak spots' in your application (for example, you won't be able to get significant Work Experience or internships), then you really should discuss your profile with an Admissions Expert sooner rather than later. There might be moves that you can make now (in May) that will give you enough lead-time to strengthen your application. If you wait until later on (re: September), then you might not have enough time to improve the areas that need improving.
While you might be tempted to just work through lots of practice questions at this point, you actually need consistent, professional guidance, so that you can learn all of the patterns, tactics and 'secrets' of the GMAT (without having to try to figure out all of that stuff on your own). As such, you would likely find it beneficial to invest in a GMAT Course of some kind (either Guided Self-Study or instructor-led). Most GMAT Companies offer some type of free materials (practice problems, Trial Accounts, videos, etc.) that you can use to 'test out' a product before you buy it. We have a variety of those resources at our site (
www.empowergmat.com). I suggest that you take advantage of all of them then choose the one that best matches your personality, timeline and budget.
GMAT assassins aren't born, they're made,
Rich