Hi Tavi,
From what I've seen, young adults are getting dumber every minute.
Do you like those odds?
No seriously, your percentile couldn't have changed very much, and that's assuming that October's results have been factored in. (Unlikely, since I've been calling in twice a day for the last week or so and my scores aren't available yet...
) If you look in the practice booklet online, you'll see that the percentiles for that test were computed over four years. Odds are that April was not the first test date for your booklet, so the percentiles have probably evened off already. The subscores might change a little, if your subject test had subscores.
In any case, pay $12 and hear your score by phone - for some online apps, you'll need to type in the percentile as well as the score, so you should make sure it matches the one that will be on their report
Then send right after.