Hello,
Judging from the combination of
seizure, headache and cognitive changes I agree with your concern.
The first seizure at that age should be definitely carefully investigated as it could be in the setting of brain lesions such as
stroke, tumour, infection etc, any of those can produce a clinical picture of a headache, seizures and behaviour changes.
So she should have a neurological exam and probably brain imaging to investigate for brain lesions.
It is unclear what medication was she given and for what suggested purpose, might be medication side effects as well, but can't say with current info, should be seen as soon as possible.
Hope I have answered your query. Let me know if I can assist you further.
Take care
Regards,
Dr Olsi Taka, Neurologist