I have extreme problems with anxiety. Six months ago my husband had a “widowmakers” heart attack which most people do not survive. I was present with him on the floor as someone did cpr on him. I remember screaming his name and then the ambulance crew arrived . His heart was completely blocked. He was put into a coma for three days to preserve his organs and heart. After a week he woke up. I get flashes of the event out of nowhere. I was diagnosed with ptsd. I was told to use thought blocking.