I go through spells waking up around 3am and can't get back to sleep. It's usually when I wake up needing to pee. Once up, I"m done. . . .
I understand.
I usually do close to the same, except for 4AM + -
And it's bone and joint pain, the urinary visit is
a secondary thing. I'm already awake- make the
most of it and empty my reservoir.
I find that struggling to go back to sleep after
being fully awake just makes me feel worse.
Just as well put the coffee on and tend to
minor chores and such that I can do in the
dark of the morning.
Or get ready to fish or hunt etc.