It looks pretty ok for a beginner head.
The colour scheme is questionable, depending on what your tori's joint colours are.
The hair and face mapping is way off.
Most of the shading and highlights are actually quite good. Especially the eye(brow) things.
The mouth is decent
Heres a really good head mapping guide:
It shows that a 512x512 texture, when stretched (in this case, around a sphere), will make a perfect circle. So if you draw a flat texture, and the placement of stuff looks even, then it probably wont fit right on a head.
Try applying the image above to a 1024x512 blank document and stretching it to fit the document perfectly, you'll see that the strange oval shapes become perfect cirles. This happens on the spheres.
Its a shame you lost your work, but you can still learn from your mistakes and make a better head.
Good job though.