You have a good stretch. You are catching spirals early, sleeping better, feeling lighter. And then a stressful week hits and you are right back at 3am, deep in a full catastrophizing spiral you thought you had left behind. If that has happened to you, or when it does, here is the most important thing to know: setbacks are a normal part of the process, not evidence that the work failed.
More people lose their progress to wrong expectations than to any failure of technique. If you expect a smooth, steady climb to permanent calm, then every ordinary setback reads as failure, and you are tempted to give up. But progress with overthinking is never a straight line. It is a jagged, generally upward trend, with real dips along the way, and knowing that in advance changes how you meet the dips.
The single most important skill for the long run is how you handle a relapse into overthinking, because the relapse itself is harmless and your reaction to it is what does the damage. When you find yourself spiraling after a good stretch, the overthinking mind immediately offers a second-order catastrophe: I am overthinking again, the work is not holding, I am hopeless, I will always be like this. Notice that this is itself a spiral, a spiral about the spiral, built from the same distortions as any other.
And it can be met with the same tools. As an overview from the NCBI Bookshelf describes, cognitive behavioral therapy (CBT) works by catching and examining these distorted thoughts rather than obeying them. So you catch the second-order spiral, name the distortion, and reframe it. The reframe is straightforward and true: a single spiral after progress is a normal, expected part of change, and the fact that I noticed it and can name it is itself a sign of how far I have come.
That last point is worth dwelling on. A year ago, you would have simply been swept away by the spiral without ever seeing it. Now you notice it, name it, and can apply tools. That is progress, even in the middle of a bad night, and recognizing it keeps a setback from convincing you that nothing has changed. The negatively filtered overthinking mind will insist you are back to square one. Your own experience of catching the spiral says otherwise.
It helps to understand the natural shape of this kind of change. Often there is an early burst of improvement as the tools are new and you apply them eagerly, which creates a false expectation that it will simply keep rising. Then comes a harder phase, where the novelty fades and life throws a stressful stretch at you and the old patterns reassert themselves. This is exactly where many people conclude it has failed and quit, when the dip is a normal stage, not a verdict.
If you push through it, continuing the practices even though they no longer feel fresh and even though you have had setbacks, you reach a later phase where the skills are more automatic, the baseline is genuinely lower, and setbacks are shorter and rarer. Knowing this shape in advance is protective, because when you hit the hard phase, you can recognize it as a known stage of the journey rather than proof you cannot change.
Practically, treat every relapse as a practice opportunity rather than a verdict. Greet it with the same gentleness you would offer a friend who stumbled, return without drama to the tools, and look back over longer stretches rather than single days, because the progress becomes visible over months even when a given week is rough. Self-compassion matters enormously here, since beating yourself up for a setback just adds a second layer of distress. Cognitive behavioral approaches are, as the NHS notes, practical and skills-based, and skills are rebuilt after a lapse, not lost.
A useful frame is to think of a calmer mind as a garden you tend, not a destination you reach and keep effortlessly. Gardens have bad seasons, and the tending itself, kept up gently over time, is the calm. A setback is not the garden failing. It is just weather, and you keep tending. We cover the maintenance mindset in building a calmer default, and when a setback signals something bigger worth professional help in what to expect from therapy. We put the whole long game together in The Overthinker's Manual. Expect the dips, meet them gently, and keep going.