I just came up with a new aesthetic. It's called Tiredcore. Basically, it's about being tired all the time and wanting to sleep, but you can't seem to sleep. Some outfits I think would be best for this aesthetic would be pajamas, sweaters, sweatpants, slippers, etc. Basically anything comfortable. It's something similar to the Dreamy aesthetic. The color palette would be light colors and dark colors.
Here are some images that represent the aesthetic: