I am really scared of nuclear war and it affect my mental health

Hi guys, I am overwhelmed buy the fear of a nuclear war right now, I saw the news about the midnight clock (the doomsday clock) that is now at 89 seconds and since then I have not stopped thinking about it. Do you have any facts or recommandations to help me deal with my fear?

Thank you :)

(Sorry if my text contain a lot of mistakes, I am not an english speaker)