Some days the most creative thing you can do is review the math lesson tiny step by tiny step, make the grammar rule copywork instead of repeating the entire lesson again, or just put all the books on the shelf and get out a game.
Some days the most creative thing you can do is to throw everything in a backpack and do school at a coffee shop or leave everything at home and go to a park.
Don't be afraid, don't panic. Just take a breather and remember the reason why you chose to homeschool in the first place. One lousy day does not equate failure.