Wedding Dress Second Thoughts

I purchased my wedding dress 8 months ago. After I purchased it, I showed it to my bridal party. My sister in law told me it looked seductive (NOT the way I want to look or feel on my wedding) and not in a good way. I know she didn't mean to be unkind, but the comment has since made me feel very self conscious every time I try on the dress. I've had numerous people including my mom and future mother-in-law say they don't see any problem with it. I even added some alterations to make it a little more modest, but unfortunately, those comments still taint my view of and love of the dress. I don't want to feel self-conscious in what I'm wearing, but I still can't get this comment out of my head. It doesn't help that my dress is really nothing like what I initially thought I wanted which is making me second guess my decision. Any thoughts on how to overcome these feelings?