There are some activities that will rapidly make you tired. Chopping trees, cutting logs into planks, and especially digging will do that. Probably more I’m forgetting.
When Michael Kincaid (my wilderness guy, I think I’ve written about him) was having trouble getting to sleep, I’d have him go down and dig a couple more tiles out of his cellar, and he’d be worn out and ready to sleep.
So basically add a bit of strenuous activity to your day and the problem may resolve itself.