My head keeps hurting but I don't know why!?

For quite some time now, my head keeps on throbbing like crazy from time to time. The symptoms are: Sensitivity to light, Sensitivity to Sound, Can't move without feeling extreme pain(feels better when i'm just laying down motionless) and right before it happens it's like my right eye goes blind. Can someone please tell me what it is? And how I can treat it? I'm wayy to young to be going through this and some advice would be nice, thanks!