GiRD 4 - ARGH

So i cut out my dress, being very careful to measure it because i thought it would be tight/small according to the measurements i made of myself.  I finally got around to sewing it up today and guess what i discovered? The dress is too big.  The sleeves are the right size but the back and front are too large. Because of that, the dress wants to lay with the neckline too loose and too low, becoming a boatneck of sorts when that's not at all what i'm going for.  I'm also not sure if it's as long as i'd like, which is horrible but there's nothing i can do about that without buying more fabric.  I'm going to see if i can fix it w/o doing that but certainly not tonight.  I am simply too frustrated.  This is why i never sew, nothing turns out the way its meant to. /cry