Some days the victory is simply refusing to break the chain.

Not every day can be productive, and insisting otherwise usually ends in abandoning the whole thing. On the worst days, the useful goal is continuity rather than output, keeping the practice alive in a form small enough to survive whatever is happening. A minimal session preserves the identity of someone who does this. A skipped one starts eroding it.

Define your unbreakable minimum now, while things are calm, and make it almost embarrassingly small. On a bad day, do exactly that and count it as a full success. Protecting the streak is often more valuable than anything you would have produced.