holy crapoli! That's awesome. You definitely need some rest, it's well deserved.
You're doing awesome... maybe take a nap if possible...
With a word count like that, I don't think you should worry about a rough day! That's where being ahead comes in handy. :)
Good for you for keeping ahead of your writing! Hang in there! (My sister doesn't get sleep either.) Some days she feels so haggard.
Over 16K, you're killing it. Get some rest!!
You're making progress!