How do you know what your trigger is?

For 3 days I had a feeling that came up pretty often and I cant name it, I dont know what is it and the more i try to see what is it the more i feel worse. Usually letting feeling be and letting yourself experience it helps but not with this. I find myself feel grumpier, triggered and more angry. Its a mix of fear, but then i get angry too and I dont find letting myself experience it helpful cause I just stuck there. It feels like its in my chest and when it gets triggered it makes things hard to enjoy. I tried to be kind with myself and see what causes it but trying to be kind with myself triggers this annoying feeling and it just gets worse... i dont know what helps thats why i ask your help, if you ever experienced this... also i what i almlst forgot to mention, what is really important is that i became really sensitive to every thought, and any thought can trigger this feeling or any thought can trigger a negative feeling that will trigger this feeling. And honestly the "just accept it and let yourself feel what you feel" doesnt helps here cause i find myself really angry that i have to let myself feel the emotions that are triggered by these intrusive thoughts...

Does anyone know how to get rid of these thoughts? I have to manually breathe almost every second of everyday and it's getting tiresome and I can't stop thinking about no matter what the distractions are.

PLEASEEE READ!! I know this sounds ridiculous but lately I’ve been soo hyperfocused on my breathing. I feel like I’m not breathing right/properly, it’s hard to explain.. it just feels wrong or like my breathing pattern is wrong. How that’s possible? I have no clue. I’ve had this all day. Has anyone ever experienced this?? My doctor keeps saying anxiety but I just feel like something isn’t right.