Someone told me this sleep remedy years ago and it always works for me. When you're tucked up in bed, leave one of your limbs out of the covers. Your arm or your leg, probably your arm would be better. Make sure the heating is off. When your arm (or leg) gets really cold, take it inside the bedclothes and warm it up nicely. Rub it, cuddle it, whatever it takes. As your limb warms up, you'll become relaxed and sleep will come easily.  It always works for me. I hope it does for you too. Sweet dreams.