I don't normally comment on photo threads, and I'm not sure if this is feedback you're open to, but I think the dress looks great on you, and the problem is that sweater. Something about where it ends, and where the sleeves end (or are pushed up to, I can't tell), makes it look like your arms are wrong for the outfit, or like you're wearing a doll's sweater. Could you try the dress again with a different cover-up? I'm terrible at giving fashion advice, so I don't really know how to fix this, but to my eyes, the dress itself looks better on you than on that emaciated or airbrushed model.
