More details are needed regarding the nature of your headache to reach a diagnosis. Some headaches like migraine or tension type headache which are frequent may need preventive treatment. Since your headache has not relieved with analgesic tablet , consult a Neurologist at earliest for diagnosis and treatment.
Next Steps
Consult a Neurologist
Health Tips
Try to improve your sleep , follow sleep hygiene
Drink lots of water
Reduce screen time
Try relaxation techniques.