‘why do I get period symptoms then?’
That's baffling. Is it like phantom pregnancy, which is apparently caused by a "mind-body feedback loop, in which a strong emotion causes an elevation of hormones"? An adrenaline rush type thing?
Or is it just outright bullshit? I think there's a lot going on in trans people's minds, that they don't like to discuss openly. I dated a man who decided he was really a woman, about 10 years ago. He certainly had autogynephilia, but I didn't learn that term until much later, then, looking back, everything clicked.
From what he said about convos with various doctors, he hadn't mentioned the sexual side of things, at all. I was appalled, from what I could see, his main motivation for dressing as a woman or saying he was a woman, was that he got a huge kick out of it, and would literally come in his pants, regularly. I'll admit I got a kick out of the lingerie etc too, at the beginning, but then he became completely obsessed, (and the creaming himself became apparent, and other really creepy behaviour). There was very little feminine about him, he was quite masculine in general, could be sexist and misogynistic at times, a typical bloke. Except he admitted fairly quickly that he had a kink for dressing as a woman in the bedroom. Then out of the blue one day, he announced he wanted to transition to become a "proper" woman, and was seeminly telling his doctors what they wanted to hear? I think it was driven by his AGP? Like an anorexic begging a doctor for laxatives, for constipation they don't really have? Or a drug addict pretending to be in pain, to get a hit?