This is something only you can answer. A therapist can help, but it must be your own decision.
For many of us the need to transition was so overwhelming that at times the only possible solution was for self destruction because the social consequences of transitioning were just not acceptable. Many of us had to start a new life after transition. This includes employment and family issues. We each had to come to terms with our own issues and make a plan.
Talking with a therapist trained in gender issues is the best source for exploring yourself. The next best is local face to face support groups and then comes internet. Here at Susan's Place we try to be supportive and we can tell you our own experiences, but we cannot make any decisions for you.
At 17, do your parents know? Are they open to discussion? How about friends? Are you living with your parents or are you on your own? These are all things that will pretty much determine what you can do now. You are still quite young, so please, don't give up. For now, just make a plan that you can live with.