This is NOT easy but it can be done. Set a firm limit for "you" time. For example at 7 PM. After that, you are not allowed to think about anything work oriented, and you are not allowed to worry about other things. The time between 7 and sleep is only for eating, relaxing and doing things that creates pleasure or peace.

Thoughts that are not allowed will come, but they are pushed aside gently with the thought that it will be dealt with on the allowed time, before 7 PM another day.

It might not help with overall stress, but it will, with practice, bring some calm to the evenings. Then sleep might be better.