Probably the best thing I did to overcome my guilt and shame was to get a therapist and allow myself to experience the therapy program. I had an added issue, since I am also an Alcoholic and needed that put out of my misery too. One thing from my AA program that hit the GD, is the concept that "no (man) likes to admit they are different from their fellow (man)." I had to admit I was different from a ton of other people in regard to my addiction, so while I was at it, may as well admit I am different as far as gender identity goes too!! Talk about a load behind me on a road!!
In the therapy I had along with the 12 step program, honesty about all of me, and I mean ALL of me was the key to success. Honesty about the Gender Feelings removed a key trigger to my drinking, the hiding of a secret. The therapist provided me with someone whom I could be honest with, and who let me know when I reverted to the dishonesty. I had been afraid to be honest, but once it happened once, it could happen again, and it has been.
Even letting your feelings of the shame and guilt HERE is a step toward becoming open to others who can help you. If you have a chance seek out a therapist, espcially one skilled in gender therapy, use the chance and become honest with the world. It works.