Thank you for posting your query.
The most likely possibility of your headache is migraine
(worsening of headache when exposed to bright light) is a feature of migraine. In addition, there may be a feeling of nausea or vomiting
and increased sensitivity to loud noise.
However, since the headache has worsened after the fainting episode, you should get a brain scan done to exclude any internal brain injury
Wishing you good health,
Dr Sudhir Kumar MD DM (Neurology)
Senior consultant Neurologist