From what u described it is more likely to be migraine.its a type of primary headache where all investigations are negative.
Next Steps
use tab naprosyn 500 mg as and when you have headache.if it's more frequent and severe,u need to consult a Neurosurgeon/neurologist
Health Tips
try to have 7-8 hrs sleep everyday.dont skip meals.have food at correct time.if excessive light and sound lead to headache try to stay away from it.avoid watching TV,laptop,mobile for long hours.