Miskirsky: you say 'asides the obvious appendage at the time, my body was 100% female'. I do not see how that is possible. If you mean your body looks conventionally female, having a penis is not conventionally female. If you mean conventionally feminine, having a penis is not conventionally feminine either.
And in any case, if you are born an XY male, then every cell in your body is XY (sperm excepted, of course). Having surgery to add, remove, or refashion body parts will never change that.
I have difficulty with the whole trans debate because I've been a woman for over 60 years and when I ask myself I still don't know what it means to be female. It's like being asked whether you feel human. Er... how could I know what it feels like to be something else? (Cf. 'What is it like to be a bat'?) Yet people who've never inhabited a female body are certain what it means.
Take this description:
'A highly rational person, scientifically minded though not a scientist, trained in dialectic, philosophy, and abstract thought, a military history buff, lover of war films, action flicks, film noir and sci-fi (including Soviet and DDR), interested in the Zodiac ciphers and the identity of Jack the Ripper, lover of cricket, used to be a demon at squash, bored by gossip, celebrities, and soaps; broad-shouldered, narrow-hipped, muscular... .'
Now this:
'A tidy housekeeper, doer of laundry, crewel-work enthusiast, cat-fancier, interested in clothes, hair and make-up (though crap at applying it), soft of skin and hair, hopeless at mechanical things above changing a plug.'
Both are me, as I'm sure you've guessed. One "gender presentation" is conventionally male or masculine, the other conventionally female or feminine. The world will be a better place when gender roles are more equally shared and eventually become blurred. That means men who have "feminine" interests can still be men without being ridiculed, humiliated, or worse, and mut.mut. for women who look or behave in a "masculine" way.
If you feel threatened in male spaces, then I am deeply sorry, and I hope you find safe haven soon. But please feel sorry too for the biological women in women's spaces who would feel threatened by the presence of a male body simply because (as you know from your own experience of biological men) biological men can be dangerous, especially in circumstances where women are most vulnerable. And that's 'can be', not 'are'—but how do we tell the difference before it's too late?