[luishcorreia]

You could try valerian tea. Or melatonin.

But most important is to relax. try and go to bed always at the same time. You need to associate the bed with a plave where you sleep, not a place where you have difficulty to sleep. Read a book, take a hot bath before going to bed. Drink a glass of hot milk. All of this will induce sleep.

Melatonin worked very well for me.