I was put on Trazadone to get me sleep. It had an effect on me that would prevent my mind from racing, and I fell asleep. I have been off that now for several years.

What I do is similar to you. When I find my mind racing or worrying about something, when I lay down to sleep, I try concentrating of my bank balance or how much weight I can use doing numbers in my head for the next 3 months, etc.

It makes your mind focus on something else besides worry or racing and quite frankly boring. It works for me so I thought I would add to the discussion.