Check her eyes with an ophtamologist to exclude eye problems (such as glaucoma
or difficulty when focusing).
Talk to an ENT specialist
to further evaluate her sinuses
are often associated with the symptoms your daughter is having and might need proper treatment.
The ENT specialist would decide whether to do the X-ray of sinuses and culture of nose discharge to see if there is any infection and how to correctly treat it.
You can also check with an abdominal surgeon to check for apendicitis.