Outer skin

If your impetus for gender variance is rooted in identity it shouldn't matter how you are dressed at all times. You can express yourself in a myriad of ways and always know who you are because identity comes from an internal sense of self. This includes what you decide to do or not do with your body. 

We don't become different people because our outer skin changes.

Conversely, if your cross gender expression has an expiry date after which there is desire to go back to your "normal", there is no reason to question anything. Just enjoy it but without distress.

Labels, most especially tired and antiquated ones, need not apply.