Silver, what I feel is important is not what group you belong to, but what you are yourself. But you say you do not know for sure. That's fine. How many people do you think end their lives knowing fully who they are? I'd say very few. For your particular case, you say your obsessed with wolves, but you don't know if you are one or not. What I'd say is don't force the issue on to yourself. I think too many people do that, and make a rushed and ill-formed descision on who and what they are.
One thing I never want to see you say again is you denying yourself something because it's "not socially acceptable". Look at human society. What an awful, terrible, messed-up society they have. To conform to it is to accept it. To live by it. Fcuk that. Live by your own way of thinking, as it's the only way you'll feel comfortable, and be right in what you do.
You mentioned you are doing exams at the moment. What are they? GCSEs, AS levels, A levels? On this topic I have differing views. I both agree and disagree with what Kada has said on this. She is right in saying that it is important you get through your exams, and even if you're not human, you still have to live in their society, and so that means doing your exams. Though I am not sure I agree with giving them priority. Granted, they are very important, but so is the issue of finding out just who and what you are. The exams coming up are not final. Remember, they can be retaken - that's just what I have done before. So although they are important, you'll have to think for yourself what is more important to you.
Please post again soon, and if you feel comfortable about it, tell us a little more about how you feel. I feel we could perhaps not help you, but maybe just direct you the right way. It is called self-discovery, and so it is not the place of anyone else to tell you what to do.