You have a decision with three options.
1. Stay as you are
2. See a gender therapist
3. Come out to those who are close to you.
We can't do much for you if you pick option 1 but if you need help with the other two, let us know what you need. You are feeling a good deal of fear because of this decision and at least for me, the fear wasn't real. Once I started moving, the fear would go away until I hit the next issue. Once that issue was handled, the fear was gone again. It's far better facing your fears and get over it than living with it.
Seeing the time of years it is, this would make a great New Years resolution.