I have problems at night too. I don't know if this will help you, but I've set up a couple rules for myself:

1) Try to NOT write anything or talk to anyone about important items after 10pm
2) Before bed, create a nighttime routine
3) When I go to bed, I bring a book with me, to keep me distracted for 10+ minutes. I try to read fiction so that my mind whirls around the characters in the book and not my problem(s).
4) Sometimes, putting on a soft light in the bedroom helps.

Have you also considered Journal writing? Sometimes putting your words down on paper clears them out of your head.

Hope this helps and you are better today.

Myne Eyes