Maria
Re unable to sleep ,when I struggle to sleep ,I find what works for me is listen to a bit of radio 4 extra
I know it goes against what they tell you about no tv ,media in room but it does the job in my case .
download the app onto your phone and click on the menu button ,there you will get a great choice of documentaries ,comedies ,drama's lasting 15 mins or more ,I play it low through my headphone and I am asleep in about 5 mins .It cuts to silence once the programme is finished
You could try listening to something on it that you listened to already as you know the ending thus not staying awake to find out what happens .
I find it helps me stop concentrating on what was keeping you awake .
sorry for the long winded post ,hope it helps ,I know what a pain it is trying to get to sleep at times
HH