sexual frustration

What's the deal with masturbation and sexual urges?

17 going on 18 asks:

Hi, I'm 17 and I live in Asia. I have been feeling a lot of intense feelings these few days. I want to know about sex and I've tried masturbation twice, though only to the stage of ... the need to pee and the movement of muscles at my clitoris and vagina (I don't know who to describe it very accurately, I hope you understand) and a bit wet. I know we get this sexual feelings when we get older but I can't help feeling quite uneasy about it, as if I've done something wrong and I shouldn't have tried masturbation (although I've read your article about it). People around me NEVER talked about it. I don't know if it's they don't talk about it at all, or they haven't done it. I feel like I'm doing something wrong. I can't concentrate on my studies (I'm a student) and I feel uneasy. I felt this kind of feelings before but not as intense as this and it didn't last this long.

What's wrong with me? What should I do?

Please I really need to know about this. As I live in Asia, there's almost no way else I'm going to get the answer. Thanks!!