Severe Headaches. Problem am i having?

I have severe headache problem from past 6 years. Headache normally happens on only one side of head on particular day. It happens daily at a particular fixed time. I have consulted doctor and according to symptoms they say it's migraine and give proper medication. During medication, there is no problem but after few months headache starts again. The pain is literally unbearable and remain for the duration of 30-90 mins. Improper sleep and screen usage sometimes seems to effectively increase intensity of headache. I really feel that no doctor can solve this problem. Mostly doctors seem casual to headache symptom but it is literally unbearable to spend those 1 hour of headache .. it ruins the day. Please any suggestion what kind of problem am I having ?