That's never fun. I can never really enjoy those occasional days off due to a lack of projects either, because there's always this nagging feeling about how it'll affect my bank account. I probably worry too much about that, though, especially since there's still my wife's monthly income as well, and she usually makes more than I do unless I have an exceptionally good month.
Oddly enough, that reminds me that I still need to get the final little part of the Valentine's Day gift I have planned for her. I'll need to find a moment to sneak out of the house to do so next week. It's hard to keep surprises from each other when you both work from home.