Welcome to the forum @Bob77!
As suggested by @scottctj, sometimes sleep might not get back on track after whatever triggered it is no longer an issue because of how we react to the initial sleep disruption. In other words, it is our reaction to the sleep disruption that can perpetuate the sleep disruption.
A common thought that perpetuates sleep disruption is the belief that we will be unable to function after difficult nights. This thought can perpetuate sleep disruption because it increases arousal.
A common behavior that perpetuates sleep disruption is skipping or postponing daily events in response to difficult nights. This behavior can perpetuate sleep disruption because it guarantees that difficult nights have a bad outcome (we don’t give ourselves the opportunity to experience any other outcome) and this can lead to us putting more effort into sleep and worrying more about sleep — and this increases arousal, which makes sleep more difficult.
So, I think that by doing things that create really good conditions for sleep (such as building sleep drive by allotting an appropriate amount of time for sleep and strengthening the body clock by getting out of bed at the same time each day) you might also find it really helpful to go about your days as planned, regardless of how you sleep.
Doing that will give you the opportunity to experience positive (or at least just some OK) moments even after difficult nights. If you start to notice that you can get through the day, that you can still perform, and that you have more control over the quality of your days than how you sleep, you might start to worry a lot less about sleep — and this often leads to better sleep!
I hope this helps.
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