The challenging thing about sleep is the more you chase it, the more it eludes you. Our beliefs have a terribly power effect on our bodies. If we worry about something, it can put our bodies into a hyper-arousal. I've experienced this myself and it's caused me to lose entire night's worth of sleep.

What finally helped me was learning to worry less about how I felt. I used to worry if I felt a certain way, like excited or stressed or ruminating, I wouldn't be able to sleep. But what I learned is that I could actually sleep in all of those states, as long as I believed I could. It was like building my confidence so I could learn that sleep doesn't have to come in this perfect state of mind.

I also found the book, "This Book Will Make You Sleep," Actually the title really helpful. If you're not a big reader there's an audiobook version. The advice is very sound. Good luck and update us on how it goes.