It's a perfectly good dress and looks great. YOU like it, and most of all you feel relaxed and comfortable in it. That's important. Nothing worse than a very expensive designer dress that just doesn't FEEL right and you are pulling and tugging at it, or feel a bit "out there" in it.
Accessorise the hell out of it and you will look absolutely gorgeous.
Honestly if you looked at the ten best dressed (ahem) at the Phillips wedding yesterday, you would think they had just rolled out of bed into the nearest thing they could find. If that's the benchmark for fashion and style, well I'm gobsmacked!
Wear the dress, try different colour accessories, make a statement with the bits and all will be gorgeous.