Frequent headaches. Is this migraine?

I find it extremely difficult to see bright lights and sunlight. While I see lights, I feel intense tickling sensation in my eyes which converts to strong headache. It disappears only after taking painkillers and I almost have to take painkillers in alternate days as I have headache every single day. I have very hard times throughout summers. I can see flashes even if I close my eyes. Sometimes I have to wear sunglasses at night at places with bright lights. Is this migraine? I don't know why I'm experiencing severe headaches.. My head aches even if I bend down to pick something. I'll often feel like my head is going to explode! As I'll experience a gush of pressure while I bend down. I have headaches since childhood. MRI scans show no abnormalities. But my pain is not false. Please do help me!