I am 16 years old and I haven't taken concerta in like 2 weeks. Im getting a new doctor and I don't have an appointment until the 22 of December of 2011. I've been getting really upset about everything, and I can't concentrate in calss. Am I going through a Withdrawal? I really hate takeing Pills but they help and so I have to take it because Im trying to get through high school. Plase help me.