I have already purchased my wedding dress. I love love love it. However, I was watching TV this weekend and saw a dress that I thought was beautiful. Instantly, I started second guessing myself about my dress choice. The woman on TV was wearing a string of pearls with her dress. That also made me second guess my jewelry choices (I've already bought emerald jewelry).
When we first got engaged, I decided I only wanted a MOH. I was married before 10 years ago and had a very large bridal party. But now I feel bad that my FSIL is not a bridesmaid (though I did ask her to do a reading and she's really happy). I'll be her MOH when she marries my brother next year. And now I'm second-guessing not having another close girlfriend in the wedding.
This has also happened to me while watching Four Weddings. I started rethinking all my decor and worrying that I didn't have enough. Ugh! I need to stop.