Hi welcome to Health care magic forum.
Thanks for calling H.C.M.
After 8 years of an accedent and stitches to the face , you need not think of the chances of head injury
or nerve injury
. The present head ache could be due to anxiety
and tensions due to the gossips of the people around.
Of course some medical problems are best judged by the neighbours, rather than self or the doctors.
You are looking different than before means it could be structural, and may be due to the stitches you had on the face.
The head ache could be due to tensions due to some factors in the life also, so i advise you to consult a physician for diagnosis and treatment.