When events happen that exceed your emotional and mental abilities to deal with, we speak of overwhelm which, when unattended, can even escalate into trauma.
Depending on the situation, sometimes emergency action is required to take hold of the crisis, sometimes a stepping back is required.

Whatever the case may be, exactly because of you feeling overwhelmed, you need support and assistance.

https://www.heartandsoul.co.za/life-coaching-articles/resolve-a-crisis-in-12-steps

https://www.heartandsoul.co.za/life-coaching-articles/healing-your-wounded-self