I'm considering buying my dress online. I tried on a few dresses at David's Bridal and they told me that I'm between a 10 and a 12. I found this sample dress online that I really like. On the site it says label: 14 street:12. I'm concerned it might be too big. Can someone please help? Also, do David's Bridal's dresses run big/ small? I understand that it depends on the brand.