I think a lot of people experience these type of feelings while transitioning. You are opening yourself up to literally a new world of possibilities when it comes to how you are seen by others, how you view yourself/your body, how it will affect every aspect of your life and etc.
If this is truly what you need then it soon becomes impossible for most to even imagine returning to the half-life you led prior to beginning to live as your true gender.
Maybe before, when you ID'd as androgyne or ftm lite, it was because you were not ready to accept that you may have been born trans after living so long as 'female' in society. Now, you've been able to digest all the info and options out there, and it's time to make some choices.