For me, that feeling comes from dissociating. Anxiety is so viscerally physically uncomfortable that i try to avoid it at all costs (which leads to feeling anxious about feeling anxious lmfao meta-anxiety ftw lol). Part of that avoidance entails not even mentally getting close to the triggers. So when they become unavoidable or pop up unexpectedly, it can feel pretty drastic. I feel like my avoidance of thinking about things is probably affecting my ability to understand, and the unknown is a wellspring of anxiety. Maybe it’s different for you, or maybe this helps you understand yourself better. Either way i hope things get easier for you.