I know how frustrating that is, and I sometimes have the same issue. A few things that have worked for me are reading in bed until I (hopefully) get sleepy again, playing public radio or podcasts softly until I get sleepy, or write down in a journal what's on my mind and what I'll do about them tomorrow, then try to go back to sleep. I do all of these in bed with a very low reading light. It's often recommended to get out of bed when you can't sleep, but I've found that that wakes me up more and I just feel more rested in the morning if I've been in bed most of the night. Any reading, radio or podcast content needs to be interesting enough to distract me from my thoughts but not over stimulating. I don't know how much sleep you're getting or how old you are, but if you're older and getting 5-6 hours, you're probably getting the minimum you need. Of course, the immportant thing is how you feel during the day.

This was my problem exactly, my thoughts running around like a mouse in a maze, sometimes two or three levels of thought, jumping track from one to another. Nothing worked to solve this, although I tried many things. I didn't want to take sleeping pills, but when you get only 2-3 hours of sleep a night for weeks on end, and for years on end, you'll try anything. I tried Ambien, Lunesta, (something else that starts with an R - name I can't remember) and Trazadone. Ambien, Lunesta, and Trazadone didn't work, made me doze but not sleep. "R" gave me hallucinations. I followed the clinical trials for Belsomra for two years until it was finally approved. I was hopeful because I read that Belsomra didn't sedate, wasn't a hypnotic like other pills, but helped your mind to "be quiet". Even though I take just a small dose - 5 mg, rarely 10, it works for me. You might want to give it a try.