Hi
Welcome to the MedHelp forum!
Since chest pain comes with yelling, is there a chance you have high BP. If yes, then LBBB could be due to the high BP and when you are yelling, the BP rises. Go for a 24 hour holter and see if this is the cause. Was a ECHO done to fine the cause of LBBB such as aaotic stenosis and dilated cardiomyopathy? Conduction defect can also be due to coronary artery disease and this can be diagnosed by angiography. I think you need a more extensive cardiac testing. Take care!
It's just stress and anxiety. Most people tend to think that especially when I have been dignosed it so don't worry. Try and take medication like paracetamol to ease the pain. Or do what you normaly do to relax. Try exercising great way to feel better. (:
I have anxiety and when I get upset or yell i feel as if im going to die Things feel tight and pounding... Iam not a doctor, cant help much only can tell you how i feel with my anxiety