I had my two bottom ones out at different times. Still have the top two. I would recommend getting the surgery sometime this summer, especially since you'll be going back to school in the fall (right?)
Really, having one out isn't generally that big of a deal, and for me, having a pain just in my mouth for a few days (after surgery) was much better than a pain in my mouth, head, neck, and back all at the same time (caused from the tooth itself).
Of course, you or your parents will have to make the call about when it's time. I agree with others, though: Don't let it go on for too long; it's just not worth it!