Yes but then I always did before.
I think looking after a child is mentally draining, they need 11/12 hrs sleep a night for a reason!
When you're mentally drained it affects you physically.
For example, Mon & Tues this week I've picked up D from SIL's then headed home and he's pretty much gone to sleep for 1.5/2hrs, no fuss. I have loads of energy.
Today he did not want to go to sleep as he was soooo overtired and screamed and I was sitting in my bedroom in between going in and out of his room thinking 'I could go to sleep right now' but I had to make his dinner. He didn;t really settle so had him downstairs with me where he continued to be grouchy because he was tired. H is now putting him to bed and I'm knackered.