i have had a severe constant pain in my head for a week now, i thought it was a headache but i dont know now, i have tried paracetamol, co-codamol and sumatriptan but nothing is taking it off, i feel very dizzy as if i am going to pass out and feel sick all the time, i also squint at any sort of light and have been forgetting things recently and feel drowsy, i am 17 years old and it will not go, what advice do you have? Thankyou