How did you know it was “the one”??

For those of you ladies who have gotten their dresses, how did you know it was “The one”?? I’ve only been to 2 stores to try on dresses, both times unplanned (The first time, my mom convinced me to stop into the bridal store in her hometown real quick and look at dresses, then her and the sales lady roped me into trying on a few. The second time I went with my cousin for her final fitting and there was nobody else in the store so I tried on some dresses). So I haven’t had an actual appointment at a store with a consultant to try on dresses yet. However, when I did try on dresses on those two occasions, I had zero excitement for any dress I put on. Like none. I am completely open to the idea that maybe it was because these were not planned appointments and I was not REALLY looking and planning on buying a dress that day. Also, I recently had surgery and have gained nearly 50 pounds! So my body is definitely not the shape I am used to it being, and nowhere close to how I want it to look during my wedding. So that may also be playing into the lack of excitement when trying on dresses. I am just wondering how you ladies knew the dress you picked out was the one? Did you have an unmistakeable feeling when you tried it on that this was the dress? Was there lots of excitement?