My head hurts (like a Pounding pain) when I sit up, sit down, get up /down in general (from like a laying down position). My vision goes black for a second, but the pain keeps goin for a couple more seconds. No blurred vision. Teenager age, healthy weight, and average height for age. I have not had a concussion before, and I haven't bumped my head lately. Been going on for a day or two. I did wake up with back and neck pain one day, and that's the day my head started hurting. Also, my throat is sore.