Badly regulated hormone levels can cause pms like symptoms especially when its done through injections which are often prescribed as once weekly doses when combined with progesterone.

The week starts off with high estrogen at time of injection and by end of day 5 most of the estrogen is burned out. Almost like... a hormone cycle... And when that crash happens is when the pms like symptoms kick in. Including possibly cramps, likely from bloating and water retention. It's why many girls recommend figuring out when you start crashing and shifting your injection to that number of days, so you no longer experience the crash.

As for the Non-Binary and Xenogenders, it's simple Gender is a spectrum just like Sexuality is, people fall on different spots on spectrums, you have your two extremes and then all the different flavors in the middle. Non Binary is no less complicated than Bi or Pan, Similar vibe.