What can unhappiness feel like?

I spent the morning thinking about death. My death. I stayed under the
bed covers and tried not to wake to another day. I wished for sleep
because I didn't want to wake. I wanted death and I thought about the
different ways I could die. Like people imagine a new car or a house or
something I think about my death.

I 9imagined the different ways to die. How it would feel then finally I
could not feel forever more. I thought about the film pi. It ends with
the main character taking a drill to his head. I thought that might be a
nice option. A way to remove my consciousness but leave the flesh.

Then I woke up. The day hasn't gotten any better since.