Writing can be exhausting

I've mainly noticed this after writing particularly emotional scenes, like a flashback I just wrote for chapter 15. ((I wrote 3 or 4 chapters ahead, and edit the next one to be posted as I go)) It can be emotionally draining to write some scenes, especially thoughts involving traumas that the characters experienced. It can be kinda rough! I can't even imagine how hard it'd be to write a story like Murky Number Seven or Pink Eyes, with how dark those stories can get at times. It's honestly super impressive.