Hi, I am 15 years old and about a week ago I started noticing some things. Feeling little weird when moving around, like very slight vertigo, but I am not sure, because I only sometimes notice this. 2 days ago I noticed that, if i shake my head (fast), both sides (behind, not in front) of my head and in the back of my scalp hurt, but it goes away when I stop. I'm not experiencing headaches.