Don’t fret, precious I’m here

The answer is: the uterus isn't what causes your period, it is effected by your period. What causes your period and what causes trans women's periods is the same thing: the endocrine system.

HRT changes the sex of your endocrine system. Feminizing HRT makes it a female endocrine system, giving us a 28-day hormone cycle just like cis women. At the end of that cycle, the hypothalamus floods the body with prostaglandins. Those are what cause all but one of the period symptoms, because they make muscles inflame and contract. They are what make the uterus shed its lining, they are what cause intestinal cramps, they are what cause body aches, they are what cause headaches and migraines. The only period symptom not causes by the release of prostaglandins throughout the body is depression, and that is caused by your endocrine system simply not processing as much estrogen and from simply feeling like shit.

So, the only symptoms trans women don't get every 28 days is menstrual cramps, because yes we do not menstruate since we don't have uteruses. But migraines, depression, body aches, intestinal cramps, and the infamous "period shits" don't exactly add up to us having any better of a time. Except we have to pretend that we're fine and nothing is different because no one believes that we get periods, not even cis women.

I thought it was normal for years to feel that way, and I don't want anybody else to suffer like I did. Trans women are likely even more vulnerable to having untreated PMDD due to a combination of difficulty accessing healthcare and the fact that cis women are refusing to share the period wisdom. (I'm not a cis woman btw, just an enby with a uterus and estrogen-dominant endocrine system.) (I'm also making the assumption that trans and cis women have equal probabilities of getting PMDD, but who knows really? I doubt anyone's ever studied it.)

put some fucking puppets in that thang!!!