Good work so far! I marked some stuff that may help you:

The pink line is for things that don’t necessarily need to be changed, they may be your intention. What I would recommend do is to move the nose a little more to the front and pronunciate the angle between her nose and mouth. Her forehead may be too short, with the hairline starting too early, giving her a primitive apparence. This last one may be what’s putting you off.
The blue line is simpler, just move her ears a little more to the center of her head. Her jaw may be too straight, they usually curve to connect under the ear. It’s not an impossible shape, but uncommon.
Finally the green line, her nape is too thick and the back of her head looks squashed. The neck look fine from the front, but too large from the side.
Overall, still a good job! I hope this helps you identify what’s making you feel uneasy!
Also one nitpick, your character may not be able to unsheathe a sword that big from the back 😛