Quiet time is needed. Self-care. Start keeping a journal and write down what happened before you felt triggered or stressed. Sometimes its certain people. Sometimes its certain situations.
Find ways to get your energy back to center.
My kid used to blow up a lot when she was overwhelmed, so when she did, I'd make a pot of tea and we'd have 10 minutes of shhhhh time while sipping tea.
I would just hide in my room in the dark, maybe take a nap.