Why do I find myself tossing and turning all night, even though I'm not thinking about anything?

There could be a number of reasons . Having a coffee or tea close to bedtime . Having a nap late afternoon or so . Sometimes it's just a lot of nervous energy despite no particular thoughts . The blue light from phones can alter melatonin levels in brain and consequently our sleep pattern . The solution is sleep hygiene. To wake up early , to not nap late afternoon , avoiding coffee near to bedtime and disconnect from social media , or to atleast use brown filter on your phone . In case you still can't fall asleep, there is a think called stimulus control. Means you avoid working in bed , trains your brain that bed is only for sleep . Give yourself 30 mins . If you can't fall asleep , get out of bed and get back a little later.

I usually find myself tossing and turning even when I'm not thinking after experiencing intense emotions during the day. It could have been a great day, where I was able to spend time with my friends and do some of the things I enjoy, and I feel really grateful and joyful. On the other hand, sometimes after a really stressful day, where I had to have a hard conversation with my manager or received a bad grade on a project, I can't fall asleep even if I'm not thinking about anything. Regardless of whether I feel happy or sad during the day, there are still times where I cannot fall asleep which is often correlated with me experiencing some intense emotion.