Swanson,
If you are like I am, the stress-relief comes from allowing the other half of your personality to express herself. Keeping her locked away generates a lot of stress. It took me a long time to realize that I didn't really need to replace my male persona in favor of my female one. It turned out that in my case, I actually enjoy both personas, so, now I express my feminine side regularly, but not full-time. That works for me and makes me happy and fulfilled.
Perhaps, you can reach acceptance by embracing both sides of your personality. Ultimately, you may feel it necessary to give in completely to your feminine persona, but I'd recommend taking the time to search for your true nature. You might discover that living as a woman part-time satisfies your desires. It might be a permanent solution in your case, or at the very least, it will keep you somewhat contented until your situation allows you to transition, if that is your real goal. But remember, it is always okay to express your femininity on a part-time basis, and doing so, doesn't make any less of a woman.
All the best, hugs,
Sally