Wedding dress regret?

Hi everyone! Im having some wedding dress doubts... and I need your advice. I had gone shopping with my mom before I went with my entourage and fell in love with this head to toe lace a-line dress with an illusion top (I always wanted to be covered). When I went with my entourage and showed them the dress, they shot it down, said it's too busy and I look very old in it, and surprisingly I agreed with them! But then the issue started of having to find another dress.

I've already gone shopping with my mom so many times I just wanted to finally say yes to the dress.

So I tried on this ballgown that everyone LOVED. At first I wasn't sure, but then I warmed up to it. I was never really a girl to have huge poofy dresses or open backs. But when I tried on this dress, it just seemed to work with me! and so I said yes in the store and bought it! Now three days later I'm wondering if i made the right decision... I need your advice/opinions please!! Is it too revealing? Too much dress/poof? Does it suit my body type (I'm very thin but pretty tall). Please be honest. thanks!!