I lost my only son quite a few years back.
Sleep back them came from passing out after days without sleep.
I'm not sure what you're going through, and I'd never want to seem rude or uncaring.
I'm sure whatever heaviness you carry, it's okay to put it down at times.
You can always pick it back up if you need to later.
But, if it's just worries and fears and wonderings, well..., something that works for me sometimes is just lying in bed in complete darkness and breathing through my nose.
I close my eyes and just listen to my own breath until the sound of it fills my mind and drives everything else out.
At first it helped me to count.
I'd inhale for a count of 3 and exhale for a count of 3.
The whole time counting, 1 ~ 2 ~ 3 , 1 ~ 2 ~ 3.
All the while trying to draw my entire mind's focus to the simple sound of my breathing.
I do hope you get some rest and your dreams are peaceful.
Be well
