I think remembering that it WILL be a whirlwing would be a good thing. That's why you have video and photographs to remind you or show you want you "missed." LOL If everything between you and your fiance is good, then you really don't have big concerns. Yes, it might rain, and yes something might happen that could seem insurmountable, but what the guests come for is to see the two of you begin your new life as a married couple. GO with everything with a good attitude and smile, and you will enjoy it...

I understand you might not feel you can do that with so much anxiety... but staying grounded in that thought will help you truly enjoy the day... nothing can stop the love you have, and as long as you are both there, the minister/justice of the peace and a witness or two you will be married that day!

PS nothing ever goes completely "right".. there are just so many things involved... so take the best that the day gives you...

Best wishes!