How Do You Deal With Triggers?

To put a bit of context i would have c- trauma rather than one particular event. I don t get triggered that often but sometimes when I do, I feel terrified, panicked and almost afraid I m going to get emotional. Today for instance, I was in an office type place, no one in my room, I was on Twitter and someone had RT ed an image of self harm wounds. It really distressed me as I m only 6 weeks after quitting. What works for you?
https://www.myptsd.com/c/threads/how-do-you-deal-with-triggers.49297/