BREATHE!
Look at this way-something will inevitably go wrong on your wedding day. You simply can't have that many people in one place at one time and not have something go a little off kilter. Most likely it will be something minor you'll never even notice. But here's the kicker-at the end of your wedding day, even if your whole bridal party is sick, if only two people of however many who RSVP'ed show up, if your annoying uncle Dick pukes at the reception...you know what? you're still married to the guy who you love more than anything else in this world, and who actually made you want to take this leap in the first place. Isn't that really all that matters?
And yup-divorce happens and divorce is expensive and it's out there, but so what? Doesn't mean you're going to be the statistic. Focus on the here and now-there's no need to set your marriage up for disaster before you've even walked down the aisle.
Take some me time this weekend with NO wedding planning and just unwind. Wedding planning can get crazy, but just remember what the real goal to all of this is: being MARRIED not just having a WEDDING. Good luck!