I had something vaguely (very vaguely) similar happen a bit after I started taking progesterone. At around that time, I started getting a random stiffness/weirdness/almost-pain at the front of my right leg, maybe a third of the way down. It did feel a little bit like a muscle cramp, but localized to a very specific (and consistent) area. I only ever noticed it when walking.

Touching and massaging that area didn’t hurt or feel any different, and there wasn’t anything visibly different either, other than it being the location of a fairly noticible vein. Since it wasn’t a particularly strong sensation, I never went to the doctor. In the end, it just kind of stopped happening at some point.

This probably isn’t that helpful to you, but wanted to describe my experience since it at least had a couple things in common!

I can’t think of anything less trans-friendly than mandatory pronoun marking.

I quite liked this quote from Isabel Fall (more about identity than pronouns specifically, but still related!)

“We make boxes that seem to enclose a satisfying number of human experiences, and then we put labels on those and argue about them instead,” she says. “The boxes change over time, according to a process which is governed by, as far as I can tell, cycles of human suffering: We realize that forcing people into the last set of boxes was painful and wrong, we wring our hands, we fold up some new boxes and assure ourselves that this time we got it right, or at least right enough for now. Because we need the boxes to argue over. I do not want to be in a box. I want to sift through your fingers, to vanish, to be unseen.”