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Talk to a neurologist for a sleep study. But, first try reading a book ~1 hour before bed.

The racing mind is often your brain continuing to think/work on the day's problems. Using a screen (phone/tablet, computer, tv) right before bed has been proven to keep your mind active. Switch to something not involving a screen to allow your brain to wind down before falling asleep.

White noise and weighted sheet (not sure about the translation here) fixed that for me. Also, infusions without sugar.

Kratom and/or Kava are often worth trying. My brain chatter is happy and cheerful but those help tamper it down.