Welcome to the forum, @boagz57!
It can certainly be helpful to explore the thoughts that seem to be causing anxiety — but I don’t think you need to do this before you start allotting an appropriate amount of time for sleep.
I think it would be quite difficult to get only an hour or so of sleep for a few days in a row because sleep drive would be very strong after such a long period of wakefulness — and that would make staying awake for so long very hard (and unlikely).
Often, people who implement sleep restriction start to find that they get sleepier as the start of their sleep window approaches, they start to find it easier to fall asleep, and they start to spend less time awake during the night. All these things can help to lower sleep-related worry and anxiety — and this can lead to further improvement in sleep.
I hope this helps!
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