I usually just let my mind adrift, imagining all kinds of crazy bizarre things and worlds, and fall asleep. Trying to focus on "don't think" actually did the op

I usually just let my mind adrift, imagining all kinds of crazy bizarre things and worlds, and fall asleep. Trying to focus on "don't think" actually did the opposite for me - instead of falling asleep it made me focus on all the weird things my mind kept creating. Imagine yourself chanting "don't think" in your head while your mind creates a room, a wooden chair for you to sit on, shadows, light, a window, and the sky and the sea is upside-down outside the window, and walking on the sky is considered normal in this world. Normally I'd be falling asleep in that bizarre world but I kept chanting "don't think" instead. Absolutely useless.