why cant i get rid of this anxiety, i get these wierd unexplainable rushes from my chest to my head, which leaves me in a state of confusion, i'm on clonazepam 0.5 3 times aday, which is seeming too help but those days im not taking it i feel like im gonna die. i've had blood work done the only thing that has come back is low potassium , could i have a heart defect that the ECG isnt picking up. ???