Hi, I've Been feeling very faint and dizzy to the point I feel as if I'm going to faint and see little black dots some times, I've also been feeling pressure on my head alot and I've too codine ect but hasn't helped I've had this for 10 days and even went to a walk in center which they said was sinsus and I had high blood pressure, I'm only 18 and my sister passed away from a bleed on the brain last week.