Possibly psychosomatic observation, I take the estradiol an hour before my usual nap and those naps have been amazing.
Day four and I've got more questionably-psychosomatic observations:
Feels easier to remember dreams, or remember I have dreams, even if I settle in for a short nap. It's happened a couple times.
Also feeling leveled-off emotionally, like clearing a little side street that was blocked up, so there's nothing for anxiety to get caught on and build up. Which means I can actually focus on social interactions and don't feel awkward talking about myself - which is something that I've always hated doing (or it could be that one reason I didn't like talking about myself is Being Dealt With right now).
Could be a chemical thing, or just removing a source of anxiety. It could even be that I'm actively paying attention to this stuff right now because I want to see if it changes, so it becomes self-fulfilling.