There are times that I wanted to sleep but I just cannot. I exercise to tire myself, I read, etc. to no avail. Sometimes I can only get 4 hours of sleep at the most and I am not rested. I even tried over-the-counter medications but it will only be effective up to a certain point. When I do get longer hours of sleep, it is still not enough.
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Sounds like it would be good to consult a good sleep doctor, if you have one available.
I've found that the trick to getting to sleep is trying to stay awake, and the trick to staying awake is to try to go to sleep. Making use of that isn't always easy, though.
When I was younger, that worked for me lol! I guess it was the accumulated shift in work throughout the years which threw off my bioclock.
I want to avoid doctors as much as possible but I am open to the idea. I would have to look for a good one.