Some way (internal or external) to interrupt the thoughts that tend to push me into instability -- to guide me instead back to calm.

Those "thoughts" I have are remembrances of actual things that people tell me, or have told me, ways that actual people react to my expressions of anxiety. I don't know of anyone who can deal with any expressions of my anxiety in a calming (but not suppressing) way.

I feel that my expressions of anxiety tend to make other people anxious, and as a result, they try to stop me expressing it.