Constant headache. Or undergo a ct scan?

1. When did the Headache first start ( First Significant Headache ) The first time ? 2. How many days per month this headache happens ? 3.Is the headache localised to any particular portion or is it generalized to all the head? 4. Is it in half side of the head ? 5. Is it localised to one eye ? 6. What's the severity of Headache  on a scale of 1 to 10 ? 7. Do you Have any  - Nausea, Sinus problem, Visual problem, Aura , inability to tolerate bright light or high sound? 8. Any neck pain, heaviness of head , numbness and tingling of arms, Giddiness? 9. Any stress from work or family ? 10. Any Headache triggers - weather , Smoking, Drinking, Menstruation, Missing a meal, coffee, cheese , heavy food ? Please answer for good diagnosis and treatment.