Working out, eating healthier, regular bedtime/sleep, reading a good book and less screen time help. Dialing down alcohol, caffeine and weed. Watching a few intro to cognitive behavioral therapy videos helps too. You’re probably ruminating. Developing the correct language to name your cognitive distortions, and being able to understand that just because you feel an emotion doesn’t mean that’s how things really happened helps.

That being said it sounds like you’re going through some rough stuff. Hang in there.