For the thoughts that loop when you should be sleeping.
Waking at three in the morning with the same thought circling is common, and the thought almost always feels more certain at that hour than it does at nine. This is a short exercise for putting it down: name it, look at what it is actually claiming, and let it wait until morning.
There are ordinary explanations — sleep cycles lightening in the second half of the night, stress hormones rising before morning, alcohol, temperature. If it is persistent or you are exhausted, that is a question for a doctor, not for an oracle.
Several traditions attach meaning to the hour, and plenty of people find that framing useful. This page does not claim to know which is true; it just helps with the thought that woke you.
Yes, and nothing you write here is used for a reading.