Wind is visible mostly through what responds to it.

You never see the wind, only the grass bending and the trees leaning and the smoke going sideways. Some of the strongest forces in a life work like that: they are known entirely by their effects, and looking for the thing itself gets you nowhere.

When you cannot name what is affecting you, look at what is moving instead. What has changed in your sleep, your temper, your appetite for people. The pattern in the responses will point at the cause more reliably than introspection will.