Thanks for uploading to imgur. Now I can look at it in high rez and comment a little more.
The hair seems like you were trying to center the split in the head, but that you drew it based on the absolute position of the face, rather than where it would naturally go if you draw a line from the chin through the nose. I'll post an image so you can see what I mean:
Because of this, the forehead looks crooked; the right side (character POV) is smaller than the left. The rest of the face is actually pretty good, it's just that the hair doesn't seem to be "attached" to the head properly. It looks more like a wig that was put on off-center.
I'll see if I can get an artist friend to comment here, I'm no good at drawing and they might be able to give you some pointers.