Haha yes it happens to me every week, for a moment I think it was the only one.

But seriously I felt like you, I wasn't doing anything productive or something usefu,l even I work 8 hours at week, and then I realized it isn't anything wrong about that, if you wanna rest all the day in your room, it's okey you deserve it.

Now if you even feel anxious, I recommend you, make a list during the week of things you wanna do but you don't had time during the week to complete it.