Jayne, sweetie, I completely understand what you are saying. There is no rush to do anything.
But you are clearly not happy. You don't want to lose your wife, and you don't like who you are pretending to be. There is a small step you could take that might help, and it doesn't involve hormones, or crossdressing, or anything like that. That feeling that you are trying to desperately to suppress is you. It's the feminine side of who you are. So express some of it!
I don't know what your personality is usually like, but you can try to emphasize being a nurturer, and above all a listener. Be a healer and a helper. Favor cooperation over confrontation. Use female patterns of speech, such as "I feel", or "I think", or "It may" rather than "It is", or "You are". Do what a wife does. Support your partner's hobbies or interests, even if they are not your own. In other words, cultivate your femaleness. And above all, communicate. It may lessen your dysphoria, and your wife may love it.
With kindness,
Terri