Congratulations! Don't worry, though! I even know current students who got the application in after the deadline! The admissions committee is very forgiving and knows what kind of stress all the seniors are under! Besides, you made it in on time
Good work! Rejoice! All you have to do is wait, now! And you'll know way earlier than your peers! Right now, you should just use this time to focus on school work and also to start outlining essays for back-up applications in case you're deferred or denied admission. Good luck to you!! I really hope we see you next fall!