I ran out of time to edit my first reply, so here is an addendum… Perhaps even just deepening the shadow a bit on the left of her face/neck might help. The modeling of the shoulder could do with being improved so it is clearer that it is the nearest part to the viewer. Hope this helps.
Similar to Sprout, lose the big shadow under the chin. That mid-tone is a shade too dark for me, and maybe blend in the hair line a bit more.
Otherwise, pretty good.