It starts with a small tickle in the pit of your stomach, a gentle whisper in the darkness of your mind. You're not really sure what it means, but you know you'll never be able to shake it.
You start to overthink the simplest things: did you really turn off the stove, did you lock the front door, did you even get the kids to school on time?
And then, before you know it, you're in a full-blown existential crisis, questioning the very fabric of reality itself.
Don't worry, you're not alone. There are others out there who are just as lost, just as consumed.
Visit our undermining-your-confidence section to find others who are struggling with the crushing weight of self-doubt.
Or, if you're feeling particularly anxious, head to our second-by-second-suspicion page, where you can indulge in the finer points of minute-by-minute panic.
But be warned: once you start down this rabbit hole, there's no turning back.