Ma'am the presentation is pointing towards Migraine but need further information regarding if any association of the headache to bright light, loud noise, skipped meals, whether it's relieved by sleep or if it's more after you wake up. The aura of waviness or flash is typical of Classic Migraine.
Next Steps
Meet any nearby Ophthalmologist for detailed anterior segment and dilated Retina examination and Neurophysician to rule out other causes of such presentation.