hello 
The first thing I noticed is, that a real person couldn´t stand that way. - Her legs can´t hold her weight since they are too far on the left. Try to draw an vertical line from about the middle of her shoulders to the ground- thats where all the weight goes. In your picture that line only meets her heel. It might be better between the feet (or under one leg if she´s standing in (I don´t know the english word for Kontrapost…) the greek way ^^° ) .
It always helps me to mirror the picture while drawing- then you´ll see those mistakes thing easier on you own.
Her face is nice
But her mouth looks like it´s drawn in a frontal view to me so maybe you should lift the right end a bit up and shorten it.
Her front hand also looks a bit small to me ( aww hands… I never get those right on my own… ).
And she looks to me like she has no real neck. But I don´t know why or what to do about that…
I hope this critque was a bit helpful. 
good luck with your picture.
Cheezy