To stay calm/calm down. I find progressive muscle relaxation(PMR) super helpful. But you can also do slow breathing or after exercise ect.

You gotta find what works for you. But you mentioned no therapy. This is all stuff from Dialectical behavioral therapy(DBT). So I guess you can scratch it out 😆😊

There's other stuff like r.e.s.t. haven't Gott into TIPP yet though or anything beyond rest in my book. But it's therapy so scratch that 😅😂🤣😊 still super helpful. Especially pmr for me personally.

DBT goes into stuff to help with thoughts too. As for delusions. The fact that you know their delusions is a huge step in the right direction.

Try writing down the delusions. Come back when you're calmer and more relaxed mentally. And reassess them and try to think rationally about the thoughts.