I've been on this site for a long time now and have seen a ton of brides come and go. We had our own wedding plans completely fall apart 4 years ago and went to Jamaica just the two of us to get married.
It will only suck if you let it. Be as organized as you can. Use lists and spreadsheets if you're comfortable with them. Take breaks from the planning!! And the most important - do your best not to sweat the small stuff!!
It all does come together and will be great!