I took a nap just before it's almost time for bed. I was starting to feel overly tired, so I lay down on the bed and had that confused bit of sleep.
Somehow my thoughts were sort of at the surface and sort of not. I never really got comfortable. Then woke up not quite rested but definitely needing to get up. I have things that need to be done before going to bed in earnest.
It was a busy day so there was no way to get a nap earlier. And that's what I felt like I really needed yesterday but didn't get.
The science of napping. It's not that great to have a late nap.