Momentum is not a feeling. It's a physical fact about objects already moving, and the mistake is waiting to feel unstoppable before doing anything. Ask anyone in a streak — the runner on day forty, the writer with a chain of marked days across a calendar. They mostly report that starting got easier and no more exciting than before.
Top of your game is a pleasant thing to say and impossible to schedule.
What you can do is keep the chain unbroken today, even at a fraction of your usual intensity. Unbroken beats impressive most weeks.