Then the key for you will be to make clear what an MBA is and isn't and Pakistan, and that the standards of an MBA there are very different from those as U.S. schools. I do think it will be a challenge for you (or anyone from Pakistan who already has the degree), but nothing's impossible. Be careful to mke clear that you will be a good citizen in the classroom, though... No one wants to sit next to the guy who keeps saying, "Well, I already have my MBA, and I know that the answer is this..."
It's good that you're asking these questions now. If I could give you a wishlist for what to do and accomplish over the next few years, it's to demonstrate leadership at work (not just by managing people, but by making an impact and doing things that go beyond your job description) and to find just one or two things outside of work that you're really passionate about, and taking a leadership role there to. For the latter, it may be community service, or may not be. Preferably it is, but what's more important is that you REALLY care about it, rather than doing it just to "check a box."
Good luck!
Scott