@marjou: I have the same problem. Not every night, but often enough my mind takes off in a direction and just won’t let go. And those nights when I do fall asleep easily I very often get a rude awakening by the idiot drag racers that rev their car’s engines to screaming pitch on nearby roads in the early morning hours. Today it started at 3.45 AM. And no, I haven’t yet found earplugs that work and don’t irritate. However, even with the really messed-up sleep pattern I have learned to live with it, and not worry or obsess about it. I brought it up with my PCP, and he asked me “how do you feel in the mornings?” I honestly told him, I can’t wait to get up and get going. So my body seems ok with whatever amount of sleep I get.