I had a period of time in my life when I worked at toxic place and my stress levels were so high I could not fall asleep at night. I would have constant flow of thoughts and was laying in bed for hours with sleep not coming. I could not leave that place for some time (circumstances out of my control). I found an article about a method some RAF pilots used during the war to fall asleep. Can't find that particular article I have gone through but google yields lots of results:

https://www.google.com/search?client=firefox-b-m&sca_esv=a6b.....

I tried that as last resort before going to GP but luckily this method worked for me. Later when I left that toxic place the sleep came back on its own.

This is great ! Thanks

What is your acute concern?

There is a difference between your sleep pattern affecting important aspects of your life and your sleep pattern not following a published metric.

I mean if insomnia is causing you to fall asleep while driving see a doctor. If worrying about insomnia is the most salient effect, not worrying is an option. Unless you need a hobby, and some people do.

Our life patterns change with age. [1] Then change again with more age. Sometimes we need to go to a doctor, sometimes we don't. Good luck.

[1]: Looks like you joined HN more than ten years ago. That's enough time for things to change.

Depending on your age, some medical conditions present themselves more prominently at certain points in life. Bipolar is one; it typically becomes more / most acute in the mid to late twenties. I had a great deal of insomnia due to this condition (and still do), though it has mellowed as I’ve aged.