Islamic view on self-harm

I am in a really troubled state of mind right now. Things are not going right in my life. I know that it is haram to harm oneself, but the thought of slitting myself on my wrists, forearms, neck, thighs, legs, torso and other parts is coming to my mind nowadays. Please suggest any dua or hadith or anything to improve my condition. And please make dua for me, it's a sincere request to everyone here. If there is any dua, hadith, ayah from the Noble Qur'an to help me calm down and bring peace to my heart, then please please, for the love of Allah SWT, suggest it to me. And please, as a final request, do not use rough language in the answers.